monkey bridge

Thesaurus

Noun	1.	monkey bridge - a high narrow platform above a deck or in an engine room or boiler roomplatform - a raised horizontal surface; "the speaker mounted the platform"
	2.	monkey bridge - the highest navigational bridge on a ship; a small (often open) deck above the pilot housefly bridge, flybridge, flying bridgebridge deck, bridge - an upper deck where a ship is steered and the captain stands