The most comprehensive survey can be conducted when the vessel has been properly prepared. Valves and systems should be made accessible and not obstructed by movable equipment and storage items.  Examination of typical vessel use conditions can be done where AC and/or DC electrical power is provided, batteries are charged, fluid levels and water and fuel tanks are filled, as necessary for normal vessel operation.

It is ultimately the responsibility of the seller or his/her broker to make preparations and provisions to demonstrate the vessel and systems for observation by the surveyor on behalf of the buyer.  The sellers responsibility is sometimes abdicated to a broker/agent, who must then take responsibility to demonstrate the vessel and systems.  It is in the interest of the buyer to make it clear to the broker/agent or seller of the forgoing expectations and to furthermore so state them within the context of the purchase/prepurchase agreement.