Gemini 105Mc, 105M, and I think the previous models have 4 buoyancy chambers (one at each corner, basically). If they remain watertight, they should keep the
boat buoyant; however, if, say, you hit a reef and compromise both the buoyancy chamber and another part of the
hull, not so much. Also, one of our buoyancy chambers used to fill up with
water all by itself until I fixed it –
water that accumulated in one of the lazarettes would seep in from the top. A trick we used was filling the buoyancy chambers up with fun noodles – others use empty, sealed 2-liter plastic bottles – just for a little extra
insurance. (Friends of ours
lost their Gem off the
Yucatan after hitting a reef on the way out of an anchorage…they got in the dink and watched it sink, but were rescued very quickly. I don’t think they used any of the extra flotation ideas.)
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