The origin of these boats remains somewhat shadowy, but it would seem that they evolved from a concept initiated by the Israeli Special Operations community in the late 1980's. Patents filed in the 1990s show the design would become "the Alligator," a semi-submersible, high-speed special forces delivery, extraction and reconnaissance craft that features a very low radar cross-section. All known accounts state that the Alligator was first launched in the mid 1990s and was said to have been tested briefly by the US Special Operations community before being delivered to Israel. The number of alligators built remain a mystery.
The already low-slung Alligator has the ability to lower its draft to the point where the cabin windows sit right above the waterline via flooring ballast tanks located on each side and below the boat's main cabin. This results in the boat not only being very hard to spot on radar but it also challenging to spot visually. The streamlined hull and low drag design, along with some powerful water-jets, allow it to move at high speed, especially when its ballast tanks are empty.