topside

Short definition from Wiktionary

Noun

1. 1
   The side or part of something that is at the top.
2. 2
   The surface of a ship’s hull that is above the water line.
3. 3
   The structure and assembly of modules above the jacket or gravity base sub structure.
4. 4
   The structure and assembly of modules on the deck of any floating installation.
5. 5
   The outer side of a round of beef.

Adjective

1. 1
   Abovedeck, such as on the weather deck or bridge.

Adverb

1. 1
   Abovedeck, such as on the weather deck or bridge.