Soundfield
I did a shark research trip in the Sea of Cortez (Jan 2013) on the Sea Escape mentioned above. It was very cool, We were trying to tag Hammerheads in the open water but never really got close enough. (we meaning the doctors on board). They were diving rebreathers. We did however catch smaller sharks in the evening and insert transmitters. Again the docs making the incisions and doing the stiching, but the rest of us helped with recording and keeping the sharks alive and calm. We also recovered ocean floor recievers, cleand them and changed batteries.The diving was fantastic, Socorro is especially known for its Mantas and they did not dissapoint. Also saw white tips, hammerheads, dolphins, one whale and her calf, and one big tiger shark. Enjoy and have fun.
PS: the organization I was with is called Fins Attached and is working hard to stop shark finning. (The covert movies of finning we saw would piss you off, or make you sick)
MIke