Sorry guys, "quicklime" is technically Calcium Oxide (CaO), not Calcium Chloride (CaCl2). Two different actions. You are, however, absolutely correct about the inefficacy of using Calcium Chloride to provide a realistic solution to drying out a boat interior
while suspended in water
and surrounded by atmospheric humidity. It's like rolling rocks uphill. Better to open a port at each end of the boat and move a fair quantity of air. The relative humidity will reduce the boat's internal humidity, lowering the likelihood of mildew and water
damage. All cabinets and drawers and floorboards should also be opened a bit to allow the free passage
of dryer ambient air to absorb the resident humidity. Fans are considerably cheaper and more effective, in the long run, than Dri-Z-Aire or other products of its ilk. Sell the bag of CaCl2 to somebody who hasn't heard of this.