"OpticsII" is a two-manned one-atmospheric submersible with an operating depth of 150 ft. It has a scrubber system that scrubs CO2 from the cabin and onboard O2 to replenish the atmosphere. The sub weighs 2.5 tons and can be launched and retrieved by one person from a modified boat trailer. The sub and trailer can be towed with a standard pick up truck. The sub is more than a "TON OF FUN"!