HMT Promise in February 1943
Class overview
Name	Portuguese-class naval trawler
Builders	Estaleiros CUF (Lisbon) Arsenal do Alfeite (Lisbon) Estaleiros Mónica (Aveiro)
Operators	Royal Navy  Royal Hellenic Navy
Built	1941–1943
In commission	1941–1946
Completed	12
General characteristics
Type	Naval trawler
Displacement	525 tons
Speed	12 knots (22 km/h; 14 mph)
Complement	30
Armament	1 × 12 pdr AA gun

The Portuguese-class trawlers of World War II were naval trawlers, built in Portugal for the Royal Navy.

These vessels were built in several Portuguese yards, and offered by Portugal to the Royal Navy. This aid to the British war effort solicited protests by Nazi Germany, since, officially, Portugal was a neutral country.

After the war the ships were sold, most of them becoming mercantile vessels, some under the Portuguese flag. The former HMT Product went to the Royal Hellenic Navy.

Ships in class

• Prong – Launched 1942, mercantile vessel Sjostkerk 1964
• Proof – Launched 1942, sold 1946
• Property – Launched 1942, mercantile vessel Portrush 1946, Property 1947 and Vaagness 1955
• Prophet – Launched 1942, sold 1946
• Protest – Launched 1941, sold 1946
• Prowess – Launched 1943, sold 1946
• Probe – Launched 1942, mercantile vessel Pólo Norte 1946
• Proctor – Launched 1942, mercantile vessel Arrábida 1946
• Prodigal – Launched 1941, sold 1946
• Product – Launched 1941, minesweeper repair ship 1943, Greek Navy Hermes 1946
• Professor – Launched 1942, mercantile vessel Algenib 1946
• Promise – Launched 1941, mercantile vessel Aldebaran 1946