The document discusses the off-hire clause in the Shelltime 4 form. It defines a net loss of time clause and explains that for off-hire to apply, there needs to be an actual loss of time preventing the vessel from performing its next required task. It also notes that the Shelltime 4 form lists broader off-hire events than the NYPE form and is more generous to charterers. Finally, it states that if a vessel needs to deviate due to an off-hire event, it remains off-hire until it can resume the same position relative to its original destination.