Republic of Singapore Navy in the context of "Sea lines of communication"

The Singapore Armed Forces (SAF) are the military of the Republic of Singapore, responsible for protecting and defending the security interests and the sovereignty of the country. A component of the Ministry of Defence (MINDEF), the armed forces have four service branches: the Army, Navy, Air Force, and Digital and Intelligence Service. An integrated force, it is the most capable, robust, technologically sophisticated and powerful military in the Southeast Asia region. The SAF is headed by the chief of defence force, appointed by the President, on the advice of the Cabinet.

Since its inception, the SAF has been involved in various operations, both domestically and abroad. These include peacekeeping missions in places such as Afghanistan, Iraq and Timor Leste as well as disaster relief operations in various countries, including the 1970 Bhola cyclone, 2004 Indian Ocean earthquake and tsunami, Hurricane Katrina, 2008 Sichuan earthquake, April 2015 Nepal earthquake, Hurricane Harvey, among others. In addition, the SAF has assisted the United Nations to oversee and supervise the electoral process in countries such as Cambodia, Ethiopia, Namibia and South Africa.

The Republic of Singapore Air Force (RSAF) is the aerial service branch of the Singapore Armed Forces (SAF) responsible for controlling and defending the airspace of the country, and providing air support to the Army and Navy. It was established in 1968 as the Singapore Air Defence Command (SADC) before renaming to its current name in 1975.

As one of the larger and more technologically advanced air forces in Southeast Asia, the RSAF has undertaken a significant role in Singapore's military defence strategy since its formation. The RSAF is one of the more modern air forces in the region.

A midshipman is an officer of the lowest rank in the Royal Navy, United States Navy, and many Commonwealth navies. Commonwealth countries which use the rank include Canada (Naval Cadet), Australia, Bangladesh, Namibia, New Zealand, South Africa, India, Pakistan, Singapore, Sri Lanka, and Kenya.

In the 17th century, a midshipman was a rating for an experienced seaman, and the word derives from the area aboard a ship, amidships, either where he worked on the ship, or where he was berthed. Beginning in the 18th century, a commissioned officer candidate was rated as a midshipman, and the seaman rating began to slowly die out. By the Napoleonic era (1793–1815), a midshipman was an apprentice officer who had at least nominally served at least three years as a volunteer, officer's servant or able seaman, and was roughly equivalent to a present-day petty officer in rank and responsibilities. After serving at least three years as a midshipman or master's mate, he was eligible to take the examination for lieutenant. Promotion to lieutenant was not automatic, and many midshipmen took positions as master's mates for an increase in pay and responsibility aboard ship. Midshipmen in the United States Navy were trained and served similarly to midshipmen in the Royal Navy, although unlike their counterparts in the Royal Navy, a midshipman was a warrant officer rank until 1912.

The Chief of Navy is the head of the Republic of Singapore Navy (RSN), who holds the rank of Rear-Admiral. The current Chief of Navy is Sean Wat, who was appointed on 10 March 2023.