I put hatches in my older 22 V-berth (pix). Pretty much what everybody has said. Nice to have the space for very infrequently used items (spare prop/tools,extra rode, etc.), but not really very convenient to get at, especially if you often have a bunch of fishing gear on the v-berth as I usually do.
I certainly did not lose any flotation by cutting in there as I could see daylight in several areas at the base of the helm wall (hardly a sealed cavity, though that may have changed in later years). There was no flotation in there at all in 87. With the access hatches you could easily add styrofoam, empty 2- quart bottles, 2-part foam, bubble wrap, a blow up bladder, or whatever, if you really felt the prospect of hanging on to a bobbing bow offerred a greater level of personal security.
But I think the main benefit would soley be long term storage.
Chris
I certainly did not lose any flotation by cutting in there as I could see daylight in several areas at the base of the helm wall (hardly a sealed cavity, though that may have changed in later years). There was no flotation in there at all in 87. With the access hatches you could easily add styrofoam, empty 2- quart bottles, 2-part foam, bubble wrap, a blow up bladder, or whatever, if you really felt the prospect of hanging on to a bobbing bow offerred a greater level of personal security.
But I think the main benefit would soley be long term storage.
Chris