Tactical Strategic United Nations Authority on Maritime Investigations is a fearless organisation used for preserving world peace, exploring the world's oceans, and protecting the world's oceans from enemy threats.

The organisation was formed in 2004 as the nautical branch of U.N.T.I.L.'s security forces. Its main brief is to maintain safety and guarantee unfettered exploitation of the Earth's seas – both above and under water. Its HQ is located in the Philippines island of Palawan. With the aid of the complicated devices at their disposal, the staff of TSUNAMI can send sea craft to any point at any ocean as soon as difficulties arise and, co-ordinate their actions using the Automatic Sea Map, a huge electronic map which shows the position of every sea vehicle. The HQ boasts a wide spread system of control stations, many of which are completely automated. The Control Centre is the hub of all TSUNAMI activities. From here all sea vessels, including Stingray and Sea Leopard, can be contacted immediately and sent to any area in the world – above or below the surface of the sea. During their spare time, staff members can use the extensive recreational facilities provided in the base. These include every type of sports equipment and arena. In times of emergency, the living quarters, together with the rest of the base, descend underground. The standby lounge is a room where aquanauts wait for the final 'green light' to proceed with their alloted missions. It has been furnished in soft, restful tones to give aquanauts a last chance to relax and sort out any last-minute problems that may be bothering them. Focal point of the lounge is the three hydraulic chairs which transport aquanauts to their craft.
The injector seats in the Standby Lounge are used to transport the crew of Stingray swiftly to their waiting craft in the pen below, the seats being operated by a push-button on the chair arms.

Stingray is supported in its pen by means of a hydraulic clamp. Gripping the body, the clamp lowers Stingray below the water surface at the start of a mission. On its return, Stingray is hoisted up by the clamp to resume its normal position in the pen. In the event of damage to Stingray the water is drained out of the pen, allowing inspection and maintenance to be carried out. At the end of the ocean tunnel is the giant ocean door. At the press of a button the door slides open, giving Stingray access to the ocean. The ocean door is constructed of 12-inch-thick steelite, a tough anti-rust metal that will stand up to the most desperate enemy attack. If necessary, the command centre can refuse entry to craft which arouse their suspicions. At the press of a button they can raise or close the huge door which seals the entrance. The base hospital is recognised as one of the most modern and best equipped hospitals in the world and a team of 300 specialists, doctors and nurses is on call night and day. One of the most interesting aspects of the hospital is the research work carried out in Marine laboratories. Researches include the job of finding out how man can best adapt himself to a marine existence. One of the bases's most important defence features are its missiles. These are installed underground but as soon as the alarm is sounded they are swung into vertical position in front of the control tower.
 

TSUNAMI's pride and spearhead of all actions are its submarines of the Stingray class.

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