RE: Megatech Ocean Explorer
The megatech is the same as the National geo sub. You have to adjust the engines to dive, however you can control the engines separately to turn. It's the only difference.
Those type of subs(megatech, nikko seatiger and national geo) sucks.[:'(]
I have a nikko seawolf, I recommend you the seawolf or the walmart sub, see the posts to compare them.