In 1945, after the liberation of the Philippines, the OSP was reactivated and led by Major Jose Andrada, to reorganize and rebuild from a core of surviving OSP veterans, plus additional recruits.
The OSP was strengthened in 1947 after President of the Philippines Manuel Roxas issued Executive Order No.
94.
This order elevated the Patrol to a major command that was equal with the Philippine Army, Constabulary, and Air Force.
The OSP was renamed the Philippine Naval Patrol, later on changed its name again to the Philippine Navy on January 5, 1951.
The first commanding officer of the Navy, Jose Andrada, became its first Commodore and Chief.
This was also the year when the naval aviation arm of the Navy was formed, now the Naval Air Group.

In 1950, Secretary of Defense Ramon Magsaysay created a marine battalion with which to carry out amphibious attacks against the Communist Hukbalahap movement.
The next year, President Elpidio Quirino issued Executive Order No.
389, re-designating the Philippine Naval Patrol as the Philippine Navy.
It was to be composed of all naval and marine forces, combat vessels, auxiliary craft, naval aircraft, shore installations, and supporting units that were necessary to carry out all functions of the service.

The Philippine Navy participated in the Korean War, providing Combat Service Support and Escort Operations and in the Vietnam War Transporting the Philippine Contingent In January 1958, the Navy conducted its first US-Philippine naval exercise since the country's 1946 liberation.
The exercise was known as Operation "Bulwark One" or Exercise "Bulwark", an harbor defense exercise which commanded by a Philippine naval officer as its overall commander.
 By the 1960s, the Philippine Navy was one of the best-equipped navies in Southeast Asia.
In 1967, the maritime law enforcement functions of the Navy were transferred to the Philippine Coast Guard.
The duties stayed with the coast guard and in the 1998 it became an independent service under the Office of the President and later on the Department of Transportation.
After the 1960s, the government had to shift its attention towards the Communist insurgency and this led to the strengthening of the Philippine Army and the Philippine Air Force while naval operations were confined to troop transport, naval gunfire support, and blockade.

The fate of the US military bases in the country was greatly affected by the end of the Cold War, aside from the catastrophic eruption of Mount Pinatubo in 1991 which engulfed the installations with ash and lava flows.
The nearby Clark Air Base was eventually abandoned afterwards, while the Philippine Senate voted to reject a new treaty for Subic Naval Complex, its sister American installation in Zambales.
This occurrence had effectively ended the century-old US military presence in the country, even as President Corazon Aquino tried to extend the lease agreement by calling a national referendum, leaving a security vacuum in the region and terminated the inflows of economic and military aid into the Philippines.
In 1945, after the liberation of the Philippines, the OSP was reactivated and led by Major Jose Andrada, to reorganize and rebuild from a core of surviving OSP veterans, plus additional recruits. The OSP was strengthened in 1947 after President of the Philippines Manuel Roxas issued Executive Order No. 94. This order elevated the Patrol to a major command that was equal with the Philippine Army, Constabulary, and Air Force. The OSP was renamed the Philippine Naval Patrol, later on changed its name again to the Philippine Navy on January 5, 1951. The first commanding officer of the Navy, Jose Andrada, became its first Commodore and Chief. This was also the year when the naval aviation arm of the Navy was formed, now the Naval Air Group.
In 1950, Secretary of Defense Ramon Magsaysay created a marine battalion with which to carry out amphibious attacks against the Communist Hukbalahap movement. The next year, President Elpidio Quirino issued Executive Order No. 389, re-designating the Philippine Naval Patrol as the Philippine Navy. It was to be composed of all naval and marine forces, combat vessels, auxiliary craft, naval aircraft, shore installations, and supporting units that were necessary to carry out all functions of the service.
The Philippine Navy participated in the Korean War, providing Combat Service Support and Escort Operations and in the Vietnam War Transporting the Philippine Contingent In January 1958, the Navy conducted its first US-Philippine naval exercise since the country's 1946 liberation. The exercise was known as Operation "Bulwark One" or Exercise "Bulwark", an harbor defense exercise which commanded by a Philippine naval officer as its overall commander.  By the 1960s, the Philippine Navy was one of the best-equipped navies in Southeast Asia. In 1967, the maritime law enforcement functions of the Navy were transferred to the Philippine Coast Guard. The duties stayed with the coast guard and in the 1998 it became an independent service under the Office of the President and later on the Department of Transportation. After the 1960s, the government had to shift its attention towards the Communist insurgency and this led to the strengthening of the Philippine Army and the Philippine Air Force while naval operations were confined to troop transport, naval gunfire support, and blockade.
The fate of the US military bases in the country was greatly affected by the end of the Cold War, aside from the catastrophic eruption of Mount Pinatubo in 1991 which engulfed the installations with ash and lava flows. The nearby Clark Air Base was eventually abandoned afterwards, while the Philippine Senate voted to reject a new treaty for Subic Naval Complex, its sister American installation in Zambales. This occurrence had effectively ended the century-old US military presence in the country, even as President Corazon Aquino tried to extend the lease agreement by calling a national referendum, leaving a security vacuum in the region and terminated the inflows of economic and military aid into the Philippines.
Philippine Navy