Prerequisites
This task must take place in dry dock. The shipyard must provide all necessary tools and manpower. Appropriate lifting equipment (lifting tackle, portable crane or ship’s crane) is required. Free access through the hull or the decks must be provided.
NoteThe gate valve is heavy. Appropriate lifting equipment (lifting tackle, portable crane or ship’s crane) is required. Always use appropriate lifting equipment to minimize risk of personnel injury or equipment damages. Only certified equipment must be used.
Context
Only the basic steps of the task are offered. For more information, refer to the other descriptions and tasks in this chapter.
NoteIt is very important that the gate valve mechanisms is interfaced with the hull unit controller. When the gate valve is closed, it must not be possible to lower the transducer. When the transducer is lowered, it must not be possible to close the gate valve.
The installation trunk is not used when a gate valve is mounted. The installation trunk is then replaced with a transducer dock.