monkey bridge

English Thesaurus

1. the highest navigational bridge on a ship; a small (often open) deck above the pilot house (noun.artifact)

hypernym	:	bridge, bridge deck,
definition	:	an upper deck where a ship is steered and the captain stands (noun.artifact)

2. a high narrow platform above a deck or in an engine room or boiler room (noun.artifact)

hypernym	:	platform,
definition	:	a raised horizontal surface (noun.artifact)