On 13 December 1964, the minesweeper was fired upon with automatic weapons by an unlit vessel whilst operating as part of the Singapore Strait patrol. The vessel was overpowered and arrested by "Teal", following a further small arms engagement that resulted in the deaths of three Indonesian crew members. On 23 February 1965, "Teal" was again involved in another engagement, she detected an unlit vessel off Cape Rachado. The suspicious vessel was closed on and illuminated, and revealed nine armed men in uniform who surrendered immediately upon challenge. On 13 March 1964, became the second vessel of the 16th Minesweeping Squadron to see action, when she was fired on by an Indonesian shore battery while patrolling off Raffles Lighthouse. Eleven high-explosive rounds were fired at the ship, some landing within of the vessel, and "Hawk" withdrew from the area at speed. The following morning, "Hawk" intercepted a sampan with five Indonesians on board who were promptly arrested.