I freedive quite often off my revolution. I have it equipped with just about everything. RAM 5 spot mount with GPS, FF, Marine vhf or tri-band ham radio, and rodholder. Hobie Sidekick, anchor trolley, sail kit, turbo fins, sailing rudder and cover. I usually also carry a small cooler for snacks and water. GPS is Earthmate PN-40SE with nautical charts. FF is Lowrance X50DS with transducer mounted just in back of the mast well using the foam transducer pad and marine goop. The battery is just attached in front of the mast well using a velcro strap. VHF radio is Standard Horizon HX270S or else I use my Yaesu VX7r tri-bander. I have made a flag staff of 1/2 inch pvc stepped up to 1-1/2 inches where it stands in the rear rodholder with a full sized flag as required by law on the ocean to be displayed by any vessel. This is topped by the American flag and can host an additional mast for the red-white-red lights properly displayed by vessels with divers at night. On the bow is mounted the red and green light set from topkayaker.net (tektite mark III 2 led lights) and on the stern the white light from the same source mounted using the permanent mount with washer and locknut instead of the well nut.
I also SCUBA dive or use the kayak hose kit from Brownies and just tow the kayak instead of anchoring it.
A skin suit is usually worn except when the water is too cool when I wear a 3mm one piece suit.
Fishing, freediving and SCUBA diving off my Revolution when not just pedaling or sailing