Undersea boat

This craft is 20 feet long and 8 feet wide, with a draft of 2 feet, and is identical to a river boat (and can be used as one). As it is magical, however, its Armor'Class is 4 and has 40 Hull Points. No rowers or sailors are needed if the command words are known. The command words for the undersea boat are simple anagrams:
Command 	Command Word
Start 	Ratts
Stop 	Opts
Turn to port	Runt potrot
To starboard	Burnt toast odarr
Stop turning	Piston grunt
Submerge 	Rubes gem
Level off 	Elf ov elf
Surface 	Fur aces
When underwater, the boat radiates a water breathing effect, protecting all passengers and crew as long as they touch the boat and it is fitted with grips so passengers won't drift away.