Great thread on a question that has so many answers. I have tried all the above, and here are my 5 pesos worth:
- use a reel on the gun
- use a float with a floating line, and a 0.5Kg/1kg lead on the end, a hoop in the end helps
- dive with the lead in hand (see "pendulum") and release it on the bottom
- the lead keeps the float in place, and I can mark any interesting spots to return to
- no nasty tugging on the gun as you work around
Thats about the best solution I have found.
- use a reel on the gun
- use a float with a floating line, and a 0.5Kg/1kg lead on the end, a hoop in the end helps
- dive with the lead in hand (see "pendulum") and release it on the bottom
- the lead keeps the float in place, and I can mark any interesting spots to return to
- no nasty tugging on the gun as you work around
Thats about the best solution I have found.