SEALAB II was launched in 1965. It was nearly twice as large as SEALAB I with heating coils installed in the deck to ward off the constant helium-induced chill, and air conditioning to reduce the oppressive humidity. Facilities included hot showers, a built-in toilet, laboratory equipment, eleven viewing ports, two exits, and refrigeration. It was placed in the La Jolla Canyon off the coast of Scripps Institution of Oceanography/UCSD, in La Jolla, California, at a depth of . On August 28, 1965, the first of three teams of divers moved into what became known as the "Tilton Hilton" (Tiltin' Hilton, because of the slope of the landing site). The support ship "Berkone" hovered on the surface above, within sight of the Scripps pier. Helium diffused through glass ruining watches and electronic instruments. The helium atmosphere conducted heat away from the divers bodies so quickly temperatures were raised to to ward off chill.