My vessel is healthy and I request free practique.

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An electrochemical device that stores electric current, often specialised as a cranking battery (for starting the engine) and house battery (for powering lighting and utilities), the latter often being the deep cycle type (capable of repeated full discharge and recharge with minimal degradation). The traditional wet cell lead acid battery (with dilute sulphuric acid as the electrolyte) is being increasing replaced by the newer maintenance free gel cell batteries. Technological advances from lead acid batteries include alkaline (ni-cad) and lithium electrolyte based batteries.


Tanker whose cargo tanks are free of traces of impurities that remain after carrying crude or heavy fuel oils.


1) Not wet. 2) Free from rain.


A section of free space above the top of a oil cargo tank allowing for expansion of the oil with minimal free surface consequences.


1) A sailing course that is reaching or running. 2) A vessel is free, when she has a fair wind. 3) A freeing puff allows sheets to be eased, or the sail boat to be pointed higher. 4) When the water has been pumped out of a vessel and she is no longer encumbered.


A line or spar used to limit the free movement a sail, cargo hook or boom.


Weak bindings of easily broken twine or looped restraining ropes securing a sail that will pull free when sharply jerked.


Plates fitted in tanks to reduce free surface effect caused by moving liquids


A bulkhead normally running forward and aft, designed to reduce free surface effect. The bulkhead has holes in it to allow the flow of liquid from one side to the other in a restricted fashion.


Free In/Out and Trimmed. As per FIOS but includes trimming the leveling of bulk cargoes

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