minesweepers were also transferred from the United States to combat the threat of mine warfare within the narrow and shallow channels of the Singapore Strait. Prior to this, the SAF Diving Center had already been established in 1971 to train the first batch of frogman recruits in conducting underwater mine disposal operations. In 1975, the service was reformed as the Naval Diving Unit and based at Sembawang Camp, where it remains. During the latter half of the decade, the increased operational demands and rate of patrols led the Navy to seek three additional missile gunboats and an upgrade to the Harpoon missile for the existing fleet under Project Albatross. Due to budgetary constraints in the early 1980s, Defence Minister Howe Yoon Chong decided to allocate more funds to the Air Force for the acquisition of a squadron of F-16s; the fighter jets were deemed to possess a higher strategic strike value and capable of more diverse roles compared to ships. Howe claimed the Navy's function was best relegated to coastal defense and suggested mounting Oerlikon guns on towed barges as a replacement to guard the nation's maritime borders. Nevertheless, the reduced budget was still sufficient to commission twelve coastal patrol craft which freed the missile gunboats from daily patrols for more strategic operations. With the Navy being the lowest priority among the three services, it saw little hope of an expanded fleet with a larger stake in Singapore's defence and many people left the service. This created a "crisis of confidence" within the RSN in the next few years, which defence planners regarded as lacking a proper doctrine for existence beyond patrols and tackling illegal immigration. It was not until 1984 that naval officials convinced the government of the necessity of a seagoing fleet to secure the nation's sea lines of communication in the Malacca Strait and South China Sea, both of which lead to the Port of Singapore; a major contributor to the economy. To combat the growing technological obsolescence and decline in morale, the government launched the "Navy 2000" program. The service underwent an internal restructuring with the formation of the Coastal Command (COSCOM) in 1988 and the Fleet in 1989, formalizing the responsibilities of each class of ship. Between 1990 and 2001, the resurgent navy acquired six Victory-class missile corvettes, twelve Fearless-class patrol vessels, four Endurance-class landing ship tanks and also commissioned four secondhand Challenger-class submarines from