If you are not confident about Marine Assist Functionality do not attempt it. Refer the issue to the MA Administrator.
Add a Second Vessel to Existing Marine Assist Member
(Note: If you add a vessel to an existing marine assist subscriber whose subscription is currently active (paid up) then the expiry date of that current subscription will be re-calculated (shortened) to cover the additional cost of the newly added vessel. There is no need to take a payment unless the second vessel addition causes the subscription to expire.)