An inflatable launch recovery boat allows you to tow your sub on the water to your chosen dive site, and doesn't require a davit, or any deck space on your boat.
Additional information
The sub is extremely stable on the inflatable and actually becomes more stable the faster you go. Once you get to the dive site, you deflate the inflatable, it sinks, and the sub floats free. When you are ready to cruise back to shore, you position the sub over the inflatable, and inflate the pontoons with a scuba tank, lifting the sub up out of the water onto the inflatable. The inflatable is trailerable with the sub still aboard. Back your trailer into the water and pull the inflatable on, sub and all, and drive away. The inflatable requires only about 1.5 feet of water, so it is easier to launch and recover at a ramp than a sub alone.