Maritime Glossary 5 - OHM

Maritime Rescue Co-ordination Centre: Land-based authority responsible

for promoting efficient organization of maritime search and rescue and for

co-ordinating the conduct of search and rescue operations within a search

and rescue region

• Muster list

• Muster (to)

• MRCC

• Not under command

To assemble crew, passengers or both in a special place for purposes of

checking

• Muster list

• Muster (to)

• MRCC

• Not under command

List of crew, passengers and all on board and their functions in a distress or drill

• Muster list

• Muster (to)

• MRCC

• Not under command

(abbr. NUC) A vessel which through exceptional circumstances is unable

to manoeuvre as required by the COLREGs

• Muster list

• Muster (to)

• MRCC

• Not under command

An object such as a wreck, net, etc., which blocks a fairway, route, etc.

• Off air

• Obstruction

• Oil clearance

• Off station (of buoys)

When the transmissions of a radio station etc., have broken down, been

switched off or suspended

• Off air

• Obstruction

• Oil clearance

• Off station (of buoys)

Not in charted position

• Off air

• Obstruction

• Oil clearance

• Off station (of buoys)

Oil skimming from the surface of the water

• Off air

• Obstruction

• Oil clearance

• Off station (of buoys)

Ready for immediate use

• Operational

• Ordnance exercise

• OSC

• Overflow

Naval firing practice

• Operational

• Ordnance exercise

• OSC

• Overflow