NRP Almirante Gago Coutinho
NRP Almirante Gago Coutinho (A523) is a ship of the Portuguese Navy' Dom Carlos I-class survey vessels (ex-US  adapted in Portugal for the execution of hydrography and oceanography surveys). Before transfer to the Portuguese Navy, Almirante Gago Coutinho was formerly USNS Assurance (T-AGOS-5) of the United States Navy.

Design
The s were succeeded by the longer . Assurance had an overall length of  and a length of  at its waterline. It had a beam of  and a draft of . The surveillance ship had a displacement of  at light load and  at full load. It was powered by a diesel-electric system of four Caterpillar D-398 diesel-powered generators and two General Electric  electric motors. This produced a total of  that drove two shafts. It had a gross register tonnage of 1,584 tons and a deadweight tonnage of 786 tons.

The Stalwart-class ocean surveillance ships had maximum speeds of . They were built to be fitted with the Surveillance Towed Array Sensor System (SURTASS) system. The ship had an endurance of thirty days. It had a range of  and a speed of . Its complement was between thirty-two and forty-seven. Its hull design was similar to that of the s.

History
USNS Assurance was a Stalwart-class modified tactical auxiliary general ocean surveillance ship of the United States Navy. Stalwart-class ships were originally designed to collect underwater acoustical data in support of Cold War anti-submarine warfare operations in the 1980s.

In 1999, ex-USNS Assurance was transferred to Portugal and is now NRP Almirante Gago Coutinho survey ship.

References

External links

NavSource
 

Stalwart-class ocean surveillance ships
Cold War auxiliary ships of the United States
Ships built in Washington (state)
1985 ships
Ships transferred from the United States Navy to the Portuguese Navy