1 - How do the cables protrude from the trunking at the stern by the engine?
2 - How do you drain any water from it?
We could have had under deck, but were dissuaded for 2 reasons:
1 - We were told the cables would sprout upwards from an under deck system due to having to bend upwards to come out agan. As we have a bottle rack at the back of the boat, any dive cylinders dropped on the cables would bend them badly and cause damage. (We saw this on the tornado demo boat)
2 - under deck cabling was hard to drain and could end up getting water into the hull - thinking about this one its probably because they hadnt got a very good system of doing it.
In the end we had an solid aluminium cable run on top of the deck going backwards from the console, which works pretty well to protect the cables and keep them flat and unkinked. I havent fallen over it so far!