The following night, a SBS section succeeded in landing by helicopter while Boat Troop and D Squadron SAS set out in five Gemini inflatable boats for the island. Two boats suffered engine failure with one crew being picked up by helicopter and the other crew got to shore. The next day, 24 April, a force of 75 SAS, SBS and Royal Marines, advancing with naval gunfire support, reached Grytviken and forced the occupying Argentinians to surrender. The following day the garrison at Leith also surrendered.