buy yourself one of these Bosch angle drills. It'll be your main portable drill on the boat - fast recharge, any angle head.
Paul L
http://www.amazon.com/Bosch-PS10-2A-12-Volt-Lithium-Ion-Driver/dp/B000PI48AK/ref=sr_1_25?s=hi&ie=UTF8&qid=1310072598&sr=1-25