A “catamaran” serves as the ballast tray and supports BAYLAB during long distance moves over water. In this mode, the unit has a draft of 0.6 meters (2 feet). Near the site of bottom deployment, the final ballast is loaded, and the chamber sinks to a draft of 2.4 meters (8 feet). It is then towed to the installation site, where the flooding of on-board variable ballast allows sinking to the bottom. During submerged operations a lighted marker with a radio antenna will float above the system. A surface vessel is required on site only during resupply operations. Removal of BAYLAB from the work site is accomplished by “ blowing” the variable ballast system to float the system to the surface. If the next work site can be reached in a reasonable fashion with BAYLAB in its “deep draft” configuration, it will be towed directly to the new site. Otherwise, it will be towed to a suitable site for offloading the ballast. The hulls will then be pumped dry, at which point it will be in a shallow draft configuration, and BAYLAB will then be towed to a new site, tied to a pier, or removed from the water. In the shallow draft mode, the system can be towed at a speed of 5.5 kilometers/hour with our support craft. It can then be disassembled with hand tools into the three major components. Each component can then be loaded onto a dual axle trailer, which can be towed to a new launch site by a standard “pickup” truck.