ADJ

open

VERB + DECK

go up on
When we heard the alarm, we went up on deck

PREP

below ~
The passengers were trapped below deck
on ~
I joined the others on deck

ADJ

lower, top, upper
aft/after, main, poop, promenade, saloon, sun (on a ship)

PREP

on a/the ~
sitting on the top deck of the bus