This document outlines construction standards for local fishing vessels less than 24 meters in length. It defines key terms and specifies materials and structural requirements to ensure watertight and weathertight integrity. Specific standards are provided for hull construction, bulkheads, doors, hatchways, deck openings, ventilators, air pipes, sidescuttles, and other features. Dimensions, strengths, and closure mechanisms are defined to minimize water ingress and ensure crew safety.

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Standards Specifications for the Construction of a Local Fishing
Vessel of Less than 24 Metres in Length Overall
Country ……..….….
Fisheries Act ……....
Regulation …………
Section……………..
Schedule 9 Construction of a Steel Hulled Local Fishing Vessel

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Contents
Contents ............................................................................................................................................. 2
1 Definitions ................................................................................................................................. 3
2 Materials ................................................................................................................................... 3
3 Construction, Watertight and Weathertight Integrity ......................................................... 4
General ............................................................................................................................... 4
Watertight doors................................................................................................................. 4
Hull integrity ...................................................................................................................... 4
Weathertight doors ............................................................................................................. 4
Hatchways closed by wood covers..................................................................................... 5
Hatchways closed by covers other than wood ................................................................... 5
Machinery space openings ................................................................................................. 6
Other deck openings........................................................................................................... 6
Ventilators.......................................................................................................................... 6
Air pipes......................................................................................................................... 667
Sidescuttles and windows................................................................................................... 7
Inlets and discharges .......................................................................................................... 7
Freeing ports....................................................................................................................... 8
Working decks within an enclosed superstructure............................................................. 9
Tanks for fish in refrigerated or chilled sea water ............................................................. 9
Accommodation ................................................................................................................. 9
Ventilation........................................................................................................................ 10
Protection of the crew ...................................................................................................... 10
4. Scantlings ................................................................................................................................ 10
Welds................................................................................................................................ 10
Construction ..................................................................................................................... 11
Table 3.............................................................................................................................. 13
Figures 1 (Plate 1) ........................................................................................................... 15
Measurement of a Steel Fishing Vessel ........................................................................... 15
Figure 1 (Plate 2).............................................................................................................. 16
Figure 2 ............................................................................................................................ 17
Figure 4 ............................................................................................................................ 18
Figure 5 ............................................................................................................................ 19
Figure 6 ............................................................................................................................ 20
Appendix 1....................................................................................................................................... 21
List of Schedules .............................................................................................................. 21

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1 Definitions
1.1 For the purpose of this schedule the following terms mean:
 Length overall (Loa) is the length overall measured in a straight line from the fore side of the
stem at top to the after side of the transom or stern.
 Breadth (B) is the maximum breadth of the vessel in feet/metres measured from the inside of
the shell plating on one side to the inside of the shell plating on the other side.
 Depth (D) is the depth in feet/metres the depth measured at the middle of the length from the
top of the deck beam at side to the inside of the shell plating at the keel plus the minimum
thickness of the deck plating.
 Flush deck vessel is a vessel with a continuous weather deck located at the uppermost sheer
line of the hull.
 Height (h) is measured from the top of the floor to the top of the deck beam at side.
 Machinery space is a space including a trunk, alleyway, stairway or duct to such a space that
contains:
 propulsion machinery of any type;
 oil transfer equipment;
 electrical motors of more than 10 hp;
 refrigeration equipment;
 electrical generating machinery.
 MIG refers to the metal inert gas method of welding.
 MMA refers to the manual metal arc method of welding.
 Open boat is a vessel that is open to the elements and is not fitted with a complete watertight
or weathertight deck or structure above the waterline
 Scantling Numeral, is the result of multiplying Loa x B x D as defined above. The
measurements for obtaining the Scantling Numeral for these regulations shall be made in
Metres.
 Watertight means designed and constructed to prevent the passage of water in any direction.
 Weathertight means that in any sea conditions water will not penetrate into the ship.
2 Materials
2.1 Steel plates shall be of a Grade “A” weldable quality and free from laminations and shall have
the following properties:
 Yield stress o
f = 240 N/mm2
 Tensile strength o
s = 410 N/mm2
 Elongation = 22%
2.2 Welding wire and welding rods shall be of a type having the following or equivalent
specification:
 Welding wire MIG/CO2 BS 2901
 Rods MMA Method BS 639
2.3 Aluminium alloy may be used for superstructure, wheelhouses, whalebacks, shelters, masts
and spars, provided that the strength of the structure is no less than that required for steel. It
shall not be used for escape hatches and hatches to machinery spaces and other compartments
with a high level of fire risk,
2.4 Aluminium alloys shall be of a marine grade non-heat treatable type having the following or
equivalent specifications:
 Plates NP8/BSS5083
 Sections HP30/BS6082

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 Welding wire NG6/BS5356
3 Construction, Watertight and Weathertight Integrity
General
3.1 The Minister or delegated authority may accept the scantling tables contained in:
 the rules of a member of the International Association of Classification Societies for
vessels of 20m Loa and over;
 for vessels of less than 20m Loa, the scantling tables contained in the Construction
Standards of the Sea Fish Authority (UK) or equivalent for steel fishing of less than
20m Loa.
3.2 Strength and construction of hull, superstructures, deckhouses, machinery casings,
companionways and any other structures shall be sufficient to withstand all foreseeable
conditions of the intended service.
3.3 Bulkheads, closing devices and closures of openings in these bulkheads, as well as methods
for their testing, shall be in accordance with the requirements of the Minister or delegated
authority. Vessels constructed of steel shall be fitted with a collision bulkhead and at least
with watertight bulkheads bounding the main machinery space. Such bulkheads shall be
extended up to the working deck
3.4 Pipes piercing the collision bulkhead shall be fitted with suitable valves operable from
above the working deck and the valve chest shall be secured at the collision bulkhead inside
the forepeak. No door, manhole, ventilation duct or any other opening shall be fitted in the
collision bulkhead below the working deck
3.5 The forepeak shall not be used for carrying fuel oil, except where specially approved by the
Minister or delegated authority.
3.6 The design and construction shall be such as to avoid areas that would be difficult to access
for proper preparation of the steel for painting and maintenance of the paintwork.
Watertight doors
3.7 The number of openings in watertight bulkheads shall be reduced to the minimum
compatible with the general arrangement and operational needs of the vessel. Openings shall
be fitted with watertight closing appliances. Watertight doors shall be of an equivalent
strength to the adjacent unpierced structure.
3.8 Watertight doors may be of the hinged type, and shall be capable of being operated locally
from each side of the door.
3.9 Sliding watertight doors shall be capable of being operated when the vessel is listed up to 15
degrees either way.
Hull integrity
3.10 External openings shall be capable of being closed to prevent water from entering the vessel.
Deck openings, which may be open during fishing operations, shall normally be arranged
near to the vessel's centreline. However, the Minister or delegated authority may approve
different arrangements if satisfied that the safety of the vessel will not be affected.
Weathertight doors
3.11 All access openings in bulkheads of enclosed superstructures and other outer structures,
through which water could enter and endanger the vessel, shall be fitted with doors. Doors
shall be permanently attached to the bulkhead, framed and stiffened so that the whole
structure is of equivalent strength to the unpierced structure, and weathertight when closed.

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Gaskets and clamping devices or equivalent permanently attached to the bulkhead or to the
doors shall be able to be operated from each side of the bulkhead.
The height above deck of sills in those doorways, in companionways, erections and
machinery casings which give direct access to parts of the deck exposed to the weather and
sea shall be at least 600 millimetres on the working deck; and at least 300 millimetres on the
superstructure deck.
3.12 Where operating experience has shown justification and on approval of the Minister or
delegated authority, these heights, except in the doorways giving direct access to machinery
spaces, may be reduced to not less than 380 millimetres on the working deck; and 150
millimetres on the superstructure deck for vessels of 24m in length , or not less than 150 mm
on the working deck of vessels of 12m in length.. For vessels of intermediate length, the
minimum acceptable reduced height for sills in doorways on the working deck shall be
obtained by linear interpolation.
Hatchways closed by wood covers
3.13 The height above deck of hatchway coamings on exposed parts of the working deck shall be
at least 300 mm for vessels of 12 m in length and at least 600 mm for vessels 24 m in
length. For vessels of intermediate length the, minimum height shall be obtained by linear
interpolation. The height above deck of hatchway coamings on exposed parts of the
superstructure deck shall be at least 300 mm.
3.14 Where operating experience has shown justification and on approval of the Minister or
delegated authority the height of hatchway coamings, except those which give direct access
to machinery spaces, may be reduced from the height as specified in 3.13, or the coamings
may be omitted entirely, provided that efficient watertight hatch covers other than wood are
fitted. Such hatchways should be kept as small as practicable, and the covers should be
permanently attached by hinges or equivalent means and be capable of being rapidly closed
or battened down.
3.15 The finished thickness of wood hatchway covers shall include an allowance for abrasion due
to rough handling. Thus, the finished thickness of these covers shall be at least 4
millimetres for each 100 millimetres of unsupported span subject to a minimum of 40
millimetres and the width of their bearing surfaces shall be at least 65 millimetres.
3.16 Where fitted, wooden hatchway covers shall be capable of being secured weathertight.
Arrangements for securing wood hatchway covers weathertight shall be provided to the
satisfaction of the Minister or delegated authority.
Hatchways closed by covers other than wood
3.17 The height above deck of hatchway coamings shall be as specified in 3.13. However, where
operating experience has shown justification and on the approval by the Minister or
delegated authority, the height of these coamings may be reduced, or the coamings omitted
entirely provided the safety of vessels is not affected. In this case, the hatchway openings
shall be kept as small as practicable and the covers be permanently attached by hinges or
equivalent means and be capable of being rapidly closed and battened down, or by equally
effective arrangements to the satisfaction of the Minister or delegated authority.
3.18 For the purpose of strength calculations it shall be assumed that hatchway covers other than
wood are subjected to static loads of 10 kN/m2
or the weight of cargo intended to be, carried
on them, whichever is the greater.
3.19 Where covers are made of mild steel, the maximum stress according to 3.18 multiplied by
4.25 shall not exceed the minimum ultimate strength of the material. Under these loads, the
deflections shall not be more than 0.0028 times the span.

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3.20 Covers made of materials, other than mild steel shall be at least of equivalent strength to
covers made of mild steel and their construction shall be of sufficient stiffness to ensure
weathertightness under the loads specified in 3.21.
3.21 Covers shall be fitted with clamping devices and gaskets or other equivalent arrangements
sufficient to ensure weathertightness to the satisfaction of the Minister or delegated
authority.
Machinery space openings
3.22 Machinery space openings shall be framed and enclosed by casings of sufficient strength.
External access openings shall be fitted with doors complying with the provisions
weathertight doors or with hatch covers other than wood complying with the provisions for
covers other than wood.
3.23 Openings other than access openings shall be fitted with covers of equivalent strength to the
unpierced structure, permanently attached thereto and capable of being closed weathertight.
Other deck openings
3.24 Where essential for fishing operations flush deck scuttles of the screw, bayonet or
equivalent type, and manhole covers may be fitted, provided these are capable of being
closed watertight and such devices shall be permanently attached to the adjacent structure.
Having regard to the size and disposition of the openings and the design of the closing
devices, metal-to-metal closures may be fitted if the Minister or delegated authority is
satisfied that they are effectively watertight.
3.25 An efficient deck erection or companion-way, fitted with weathertight doors or their
equivalent, shall be provided to protect openings, other than hatchways, machinery space
openings, manholes and flush scuttles in the working deck. Companionways shall be
situated as close as practicable to the vessel's centreline.
Ventilators
3.26 The coamings of ventilators shall be as high as practicable. On the working deck, the height
above deck for coamings of ventilators, other than machinery space ventilators shall be not
less than 760 mm and on superstructure decks not less than 450 mm. When the height of
such ventilators may interfere with the working of the vessel their coaming heights may be
reduced to the satisfaction of the. Minister or delegated authority. The height above deck of
machinery space ventilator openings shall be to the satisfaction of the Minister or delegated
authority.
3.27 Coamings of ventilators shall be of equivalent strength to the adjacent structure and capable
of being closed weathertight by devices permanently attached to the ventilator or adjacent
structure. Where the coaming of any ventilator exceeds 900 mm in height, it shall be
specially supported. Ventilators shall be arranged as close to the vessel's centreline as
possible and, where practicable, shall extend through the top of a deck erection or
companionway.
3.28 Closing appliances need not be fitted to ventilators the. coamings of which extend more than
2.5 m above the working deck or more than 1.0 m above a deckhouse top or superstructure
deck.
Air pipes
3.29 Where air pipes to tanks and void spaces below deck extend above the working or
superstructure deck, the exposed parts of the pipes shall be of strength equivalent to the
adjacent structures and fitted with appropriate protection and as far as is practicable, located
close to the vessel's centreline and protected from damage by fishing or lifting gear.
Openings of pipes shall be provided with means of closing permanently attached to the pipe

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or adjacent structure. Where the Minister or delegated authority is satisfied that the vent
pipes are protected against water trapped on deck, these means of closing may be omitted.
3.30 The height of air pipes above deck to the point where water may have access below shall be
at least 760 millimetres on the working deck and at least 450 millimetres on the
superstructure deck. The Minister or delegated authority may accept reduction of the height
of an air pipe to avoid interference with the fishing operations
Sidescuttles and windows
3.31 Sidescuttles to spaces below the working deck and to enclosed spaces on the working deck
shall be fitted with hinged deadlights capable of being closed watertight.
3.32 No sidescuttle shall be fitted in such a position that its sill is less than 500 millimetres above
the deepest operating waterline
3.33 Sidescuttles fitted less than 1000 millimetres above the deepest operating waterline shall be
of the fixed type
3.34 Sidescuttles, together with their glasses and deadlights, shall be of an approved construction.
Those prone to be damaged by fishing gear shall be suitably protected.
3.35 Skylights leading to spaces below the working deck shall be of substantial construction and
capable of being closed and secured weathertight, and with provision for adequate means of
closing in case of damage to the inserts. Skylights leading to machinery spaces shall be
avoided as far as practicable.
3.36 Toughened safety glass or suitably permanently transparent material of equivalent strength
shall be fitted in all wheelhouse windows exposed to the weather. The means of securing
windows and the width of the bearing surfaces shall be adequate having regard to the
window material used. Openings leading to spaces below deck from a wheelhouse whose
windows are not provided with the protection required by 3.3.7 shall be fitted with a
weathertight closing appliance.
3.37 Deadlights or a suitable number of storm shutters shall be provided where there is no other
method of preventing water from entering the hull through a broken window or sidescuttle
3.38 The Minister or delegated authority may accept sidescuttles and windows without deadlights
in side or aft bulkheads of deck erections located on or above the working deck if satisfied
that the safety of the vessel will not be affected.
3.39 The number of openings in the sides of the vessel, below the working deck shall be the
minimum compatible with the design and proper working of the vessel. Such openings shall
be provided with closing arrangements of adequate strength to ensure watertightness and the
structural integrity of the surrounding structure.
Inlets and discharges
3.40 Discharges led through the shell either from spaces below the working deck or from within
enclosed superstructures or deckhouses on the working deck and fitted with weathertight
doors shall be fitted with means for preventing water from passing inboard.
3.41 Each separate discharge shall have an automatic non-return valve with a positive means of
closing it from a readily accessible position. The means for operating the valve with a
positive means of closing shall be provided with an indicator, showing whether the valve is
open or closed. Such a valve is not required if the Minister or delegated authority considers
that the entry of water into the vessel through the opening would not lead to dangerous
flooding and that the thickness of the pipe is sufficient.
3.42 The open inboard end of any discharge system shall be above the deepest operating
waterline at an angle of heel satisfactory to the Minister or delegated authority.

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3.43 In machinery spaces main and auxiliary sea inlets and discharges essential for the operation
of machinery shall be controlled locally. Controls shall be readily accessible and shall be
provided with indicators showing whether the valves are open or closed.
3.44 Fittings attached to the shell and all valves required by this regulation shall be of steel,
bronze or other ductile material. All pipes between the shell and the valves shall be of steel,
except that in spaces other than machinery, spaces of vessels constructed of material other
than steel the Minister or delegated authority may approve the use of other materials.
Freeing ports
3.45 Where bulwarks on weather parts of the working deck form wells, the minimum freeing port
area (A) in square metres, on each side of the vessel for each well on the working deck shall
be determined in relation to the length (l) and height of bulwark in this well as follows:
.1 A = K x l
where: K = 0.07 for vessels of 24 m in length, and
K = 0.035 for vessels of 12 m in length;
for vessels of intermediate length, the value of K shall be obtained by linear interpolation.
(l need not be taken as greater than 70% of the vessel a length.)
.2 Where the bulwark is more than 1.2 m in average height the required area shall be
increased by 0.004 m2
per metre of length of well for each 100 mm difference in height.
.3 Where the bulwark is less than 900 mm in average height, the required area may be
decreased by 0.004 m2
per metre of length of well for each 100 mm difference in height.
3.46 The freeing port area calculated according to 3.4.6 shall be increased where the Minister or
delegated authority considers that the vessel's sheer is not sufficient to ensure rapid and
effective freeing of the deck of water.
3.47 Subject to the approval of the Minister or delegated authority the minimum freeing port area
for each well on the superstructure deck shall be not less than one half the area (A) given in
3.4.6 except that where the superstructure deck forms a working deck for fishing operations
the minimum area each side shall be not less than 75 percent of the area (A).
3.48 Freeing ports shall be so arranged along the length of bulwarks as to provide the most rapid
and effective freeing of the deck from water. Lower edges of freeing ports shall be as near
the deck as practicable.
3.49 Poundboards and means for stowage and working the fishing gear shall be arranged so that
the effectiveness of the freeing ports will not be decreased or water trapped on deck and
prevented from easily reaching the freeing ports. Poundboards shall be so constructed that
they can be locked in position when in use and will not hamper the discharge of shipped
water
3.50 Freeing ports over 300 mm in depth shall be fitted with bars spaced not more than 230 mm
nor less than 150 mm apart or provided with other suitable protective arrangements. Freeing
port covers, if fitted, shall be of approved construction. If devices are considered necessary
for locking freeing port covers during fishing operations they shall be to the satisfaction of
the Minister or delegated authority and easily operable from a readily accessible position.
3.51 In vessels intended to operate in areas subject to icing, covers and protective arrangements
from freeing ports shall be capable of being easily removed to restrict ice accumulation. The
size of opening and means provided for removal of these protective arrangements shall be to
the satisfaction of the Minister or delegated authority.
3.52 Where wells or cockpits are fitted in the working deck or superstructure deck with their
bottoms above the deepest operating waterline, efficient non-return means of drainage

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overboard shall be provided. Where bottoms of such wells or cockpits are below the deepest
operating waterline, drainage to the bilge will have to be provided.
Working decks within an enclosed superstructure
3.53 Such decks shall be fitted with an efficient drainage system having an appropriate drainage
capacity to dispose of washing water and fish guts, to the satisfaction of the Minister or
delegated authority.
3.54 All openings necessary for fishing operations shall be provided with means for quick and
efficient closures by one person, to the satisfaction of the Minister or delegated authority.
3.55 Where the catch is brought on to such decks for handling and processing, the arrangements
for the catch to be placed in a pound, shall be to the satisfaction of the Minister or delegated
authority. An efficient drainage system shall be fitted. Adequate protection against
inadvertent influx of water to the working deck shall be provided.
3.56 At least two exits from such decks shall be provided.
3.57 The clear headroom in the working space shall be not less than two metres.
3.58 A fixed ventilation system providing at least six changes of air per hour shall be provided.
Tanks for fish in refrigerated or chilled sea water
3.59 If refrigerated or chilled seawater tanks or similar tank systems are used, such tanks shall be
provided with a separate permanently fitted arrangement for the filling and emptying of
seawater.
3.60 If such tanks are to be used to also carry dry cargo, the tanks shall be arranged with a bilge
system and provided with adequate means to avoid ingress of water from the bilge system
into the tanks.
Accommodation
3.61 When a vessel is intended to be at sea for more than 24 hours an adequate standard of
accommodation for all on board shall be provided. This shall include adequate ventilation,
lighting, fresh water supply, sleeping accommodation, galley and toilet facilities. The
sleeping bunks shall be of adequate length and breadth to allow the incumbent to stretch out
in comfort.
3.62 There should be at least two easily accessible means of escape from each accommodation
space.
3.63 The interior walls of accommodation spaces may as required be lined with marine plywood
or plastic laminated sheets.
Galleys
3.64 Cooking facilities shall be provided for the crew, either kerosene or Liquefied Petroleum
Gas (LPG) may be used to fuel cook stoves.
3.65 Cooking facilities shall not be installed in areas used for sleeping accommodation.
3.66 When LPG fuel is used audible gas alarm/sensors shall be installed in the galley under stove
or at lowest point in galley, if other lower level accommodation areas are adjacent to the
galley audible alarm/sensors shall also be installed at the low point of these
accommodations.
3.67 Gas cylinders shall be installed outside wheelhouse / deckhouse in a dedicated locker that
shall permit any escaping gas to be vented to atmosphere or overboard, gas cylinder lockers
shall not be closer than 0.9m (36”) to any opening to the interior of the boat.
3.68 Gas piping shall be of an approved material with permanently attached swaged end fittings,
worm drive clips shall not be used.

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3.69 A single action shutoff valve shall be installed adjacent to the stove in an easily accessible
location.
3.70 A pressure gauge shall be installed at the low-pressure side of the gas cylinder regulator
unit, the gauge is used to check for leaks in the system.
3.71 Cooking appliances shall have individual push and turn controls for each burner.
3.72 LPG warning notices shall be placed at the cylinder locker and adjacent to the cooking
appliance.
Ventilation
3.73 All crew accommodation compartments shall have adequate ventilation provided, either
natural or mechanical. Ventilators shall be designed to prevent ingress of water, and shall be
capable of being closed if required.
Protection of the crew
3.74 In every decked vessel, sufficient bulwarks, guard rails or guard wires shall be provided at
the exposed parts of the freeboard and superstructure decks and the tops of any deckhouses
or companionways used in the operation of the vessel.
3.75 In every decked vessel, adequate guard rails, lifelines, gangways or passages shall be
provided for the passage of the crew between their quarters, machinery spaces and working
spaces. Storm rails shall be fitted on the outside of all deckhouses and casings.
3.76 Controls of winches, line and net hauling shall be placed in a manner that the operators have
ample room for their unimpeded operation and that they have a clear view on the working
area. The winches and equipment shall be fitted with safety devices that are designed to
prevent accidents.
4. Scantlings
Welds
4.1 The leg of a fillet weld shall be in relation to the thickness of plate as given in Table 1-
t
l

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Table 1
Plate thickness t in mm Minimum measurement for l in mm
< 4 2.0
4 - 6.5 2.5
over 6 - 8. 3.0
> 8 3.5
4.2 Types of welding for stressed structures shall be:
Brackets for beams continuos welding
Plating continuos welding
Floors continuos welding
Foundations for engines continuos welding
Keel and stem continuos welding
Keelson intermittent welding
Bulkhead stiffeners intermittent welding
Frames intermittent welding
4.3 Intermittent welding shall be in accordance with the provisions given in Table 2
Table 2:
Thickness of plate “t” in
mm
Length of weld “lw in
mm”
Spacing between weld “s” in
mm
3 -4.5 50 100
5 -6.5 65 130
7 - 8,5 75 150
9 - 10.5 100 150
11 -15 100 150
Stagger s
lw
Chain s
lw
Construction
4.4 Minimum scantlings are set out in Table 3 for vessels of less than 20 Loa or a scantling
number of 270 and below. For vessels of a scantling numeral falling between those given in
the Table, the minimum acceptable standards shall determined by linear interpolation.

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4.5 The Minister or delegated authority may apply the scantling tables contained in the rules of a
member of the International Association of Classification Societies for vessels of 20m Loa and
over.
4.6 The Minister or delegated authority may accept the scantling tables contained in the
Construction Standards of the Sea Fish Authority of the United Kingdom or equivalent for
steel fishing of less than 20m Loa provided that they are no less stringent than the
requirements of Table 3.
4.7 The bottom plate shall extend from the keel to the first chine or to the design water line if the
hull is of round bilge design.
4.8 Where a bar keel is not fitted, the thickness of the keel plate shall be not less that 1.25 times
the thickness of the bottom plate. Keel plates shall be fitted with a vertical stiffener where the
keel plate does not form part of the engine seating or where the keel plate forms part of the
structure in way of the intermediate shaft.
4.9 Where profiled metal is specified, the nearest production standard may be selected provided
that the cross sectional area is no less than that of the specified component and that the
thickness is not reduced by more than 10%.
4.10 Where openings to spaces below the main deck are within the superstructure, the
superstructure shall be weathertight unless the coverings of the access openings are
weathertight.
4.11 Where a deckhouse/wheelhouse is constructed of aluminium it shall be suitable insulated from
the steel. Bolts attaching the deckhouse/ wheelhouse to the steel structure shall be fitted with
insulating sleeves and grommets. The Minister or delegated authority may accept a design
incorporating patent transducer bar for welding if satisfied that the aluminium would be
electrically isolated from the steel.
4.12 Deckhouses/wheelhouses of wood or fibreglass construction where incorporated in the design
of the vessel, shall comply with the provisions of Schedules 7 and 8 respectively.
4.13 On fishing vessels with Scantling Numbers of 200 and above a wheelhouse/deckhouse shall
be constructed of steel.
4.14 Flat bar stiffeners may be accepted for steel deckhouses on the provision that the cross
sectional area of the bar is not be less than that of the angle iron specified and the spacing
given in Table 3 shall be reduced by 25mm.
4.15 Load bearing attachments necessary for fishing operation shall not be fitted directly to the
plating of a deckhouse or wheelhouse. Doubling plates shall first be fitted and where welded,
the weld shall be continuous. The area of the doubling plate shall not be less than twice the
area of the attachment. The thickness of the doubling plate shall be at least 10% greater than
the plate to which it is to be attached.

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Table 3
Minimum Scantlings (in millimetres) for Welded Steel Local Fishing Vessels
Component
Scantling Numeral
40 70 170 215 270
Stem bar 12 x 150 18 x 150 25 x 150 25 x 150 25 x 200
Bar Keel 12 x 150 18 x 150 28 x 150 30 x 150 32 x 200
Stern post 80 x 40 100 x 50 120 x 60 120 x 60 150 x 60
Skeg 12 15 15 15 15
Rudder blade 10 12 15 15 18
Rudder post 40 diam. 45 diam. 50 diam. 65 diam. 75 diam.
Stem plates 3 6 6 6 8
Stern Plates 3 4.5 6 6 6
Stern
stiffeners
40 x 40 x 3
angle iron
50 x 40 x 6
angle iron
75 x 50 x 6
angle iron
75 x 50 x 6
angle iron
100 x 50 x 6
angle iron
Engine bed
vertical plates
5 6 6 6 8
Engine seats 12 15 15 22 25
Transverse
Frames
Normally not
applicable
62 x 38 x 6
angle iron
75 x 50 x 6
angle iron
75 x 50 x 6
angle iron
100 x 50 x 6
angle iron
Frame spacing as above 375 375 450 500
Longitudinal
Frames
50 x 40 x 6
angle
75 x 50 x 6
angle
75 x 50 x 6
angle
75 x 50 x 6
angle
100 x 50 x 6
angle
Frame spacing 300 375 450 450 450
Web frames 100 x 75 x 4
angle iron
125 x 50 x 6
“T” section
150 x 75 x 6
“T” section
150 x 75 x 6
“T” section
175 x 75 x 7.5
“T” section
Web frame.
spacing
450 1150 1150 1350 1500
Floors 4 x 50 flange 6 x 50 flange 6 x 50 flange 6 x 60 flange 6 x 65 flange
Floor spacing 375 375 375 450 500
Bulkheads 3 4 6 6 6
BHD.
Stiffeners
40 x 40 x 4
angle iron
50 x 50 x 6
angle iron
75 x 50 x 6
angle iron
75 x 50 x 6
angle iron
100 x 50 x 6
angle iron
Beams 40 x 40 x 4
angle iron
50 x 50 x 6
angle iron
75 x 50 x 6
angle iron
75 x 50 x 6
angle iron
100 x 50 x 6
angle iron
Main beams 50 x 50 x 6 75 x 50 x 6 100 x 50 x 6 100 x 50 x 8 120 x 75 x 8
Beam spacing 375 375 375 450 500
Deck plating 3 4 5 5 6
Shell plating 3 4. 6 6 6
Bottom plating 4 6 8 9 9

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14
Minimum Scantlings (in millimetres) for Welded Steel Local Fishing Vessels (cont.)
Component
Scantling Numeral
40 70 170 215 270
Chine bar 20 diam. 22 diam. 23diam. 25 diam. 28 diam.
Beams 40 x 4 flat bar 50 x 5 flat bar 40 x 40 x 4
angle iron
40 x 40 x 6
angle iron
40 x 40 x 6
angle iron
Stiffeners 40 x 4 flat bar 50 6 flat bar 40 x 40 x 4
angle iron
40 x 40 x 6
angle iron
40 x 40 x 6
angle iron
Spacing 400 400 425 450 500
Plating 3 4 4 5 5
Top-plate w/h 3 3 4 4 5
Top- plate d/h 3 3 4 5 5
Bulwark plate 4 5 6 7 7
Bulwarks
Stanchions
75 x 6 100 x 6 100 x 8 120 x 8 120 x 10
Bulwark rail/
capping
35 OD 40 OD 50 OD 65 OD 65 OD
_____________________________

15. 3:47 PM11:45 AM11:44 AM01/28/1608/07/08
Figures 1 (Plate 1)
Measurement of a Steel Fishing Vessel

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16
Figure 1 (Plate 2)

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17
Figure 2
Beam knees

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Figure 4
Longitudinal girder brackets

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19
Figure 5
Side frame bottom brackets

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Figure 6
Typical bottom construction

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Appendix 1
List of Schedules
Schedule 1 Prescribed Forms
Schedule 2 Prescribed Fees
Schedule 3 Safety Equipment for a Local Fishing Vessel
Schedule 4 Fire Protection, Fire Detection, Fire Extinguishing and Fire Fighting Equipment.
Schedule 5 Equipment/Ground Tackle/Anchors and Chains
Schedule 6 Stability and Associated Seaworthiness
Schedule 7 Construction of a Wooden Hulled Local Fishing Vessel
Schedule 8 Construction of a Fibreglass Hulled Local Fishing Vessel
Schedule 9 Construction of a Steel Hulled Local Fishing Vessel
Schedule 10 Machinery and Electrical Installations
Schedule 11 Specifications for the Marking of Fishing Vessels