ADROIT minesweepers
nearly sister-ship PC466 1945
| No | Name | Builder | Laid down | Launched | Comm | Fate |
| AM82, 6/1944- PC1586 | Adroit, 6/1944- unnamed | Commercial Iron Wks, Portland | 7/1941 | 21/2/1942 | 7/1942 | stricken 1/1946 |
| AM83, 6/1944- PC1587 | Advent, 6/1944- unnamed | Commercial Iron Wks, Portland | 8/1941 | 12/3/1942 | 7/1942 | stricken 2/1946 |
| AM84, 6/1944- PC1588 | Annoy, 6/1944- unnamed | Commercial Iron Wks, Portland | 12/1941 | 6/4/1942 | 9/1942 | stricken 3/1946 |
| AM85, 6/1944- PC1589 | Conflict, 6/1944- unnamed | Commercial Iron Wks, Portland | 1/1942 | 18/4/1942 | 9/1942 | stricken 1946 |
| AM86, 6/1944- PC1590 | Constant, 6/1944- unnamed | Commercial Iron Wks, Portland | 2/1942 | 9/5/1942 | 9/1942 | stricken 1954 |
| AM87, 6/1944- PC1591 | Daring, 6/1944- unnamed | Commercial Iron Wks, Portland | 3/1942 | 23/5/1942 | 10/1942 | stricken 1946 |
| AM88, 6/1944- PC1592 | Dash, 6/1944- unnamed | Commercial Iron Wks, Portland | 4/1942 | 20/6/1942 | 10/1942 | stricken 1946 |
| AM89, 6/1944- PC1593 | Despite, 6/1944- unnamed | Dravo, Pittsburgh | 11/1941 | 28/3/1942 | 8/1942 | stricken 1946 |
| AM90, 6/1944- PC1594 | Direct, 6/1944- unnamed | Dravo, Pittsburgh | 12/1941 | 25/4/1942 | 8/1942 | stricken 1946 |
| AM91, 6/1944- PC1595 | Dynamic, 6/1944- unnamed | Dravo, Pittsburgh | 1/1942 | 26/5/1942 | 9/1942 | stricken 1946 |
| AM92, 6/1944- PC1596 | Effective, 6/1944- unnamed | Dravo, Pittsburgh | 1/1942 | 12/6/1942 | 10/1942 | stricken 1946 |
| AM93, 6/1944- PC1597 | Engage, 6/1944- unnamed | Dravo, Pittsburgh | 2/1942 | 11/7/1942 | 10/1942 | to Dominican Republic 1946 (Cibao) |
| AM94, 6/1944- PC1598 | Excel, 6/1944- unnamed | Jakobson, Oyster Bay | 12/1941 | 10/5/1942 | 12/1942 | to Maritime Comm. 6/1947 |
| AM95, 6/1944- PC1599, 8/1945- PCC1599 | Exploit, 6/1944- unnamed | Jakobson, Oyster Bay | 5/1942 | 7/9/1942 | 2/1943 | to Maritime Comm. 3/1949 |
| AM96, 6/1944- PC1600 | Fidelity, 6/1944- unnamed | Nashville Bridge | 10/1941 | 28/2/1942 | 9/1942 | to Maritime Comm. 6/1948 |
| AM97, 6/1944- PC1601, 8/1945- PCC1601 | Fierce, 6/1944- unnamed | Nashville Bridge | 10/1941 | 5/3/1942 | 10/1942 | stricken 1946 |
| AM98, 6/1944- PC1602, 8/1945- PCC1602 | Firm, 6/1944- unnamed | Penn-Jersey, Camden | 10/1941 | 29/5/1942 | 4/1943 | to Maritime Comm. 6/1948 |
| AM99, 6/1944- PC1603 | Force, 6/1944- unnamed | Penn-Jersey, Camden | 11/1941 | 7/9/1942 | 6/1943 | sunk 21/5/1945 |
|
Displacement standard, t |
280 - 414 |
|
Displacement full, t |
330 - 463 |
|
Length, m |
51.8 wl 52.9 oa |
|
Breadth, m |
7.06 |
|
Draught, m |
2.36 - 3.30 full load |
|
No of shafts |
2 |
|
Machinery |
2 diesels |
|
Power, h. p. |
1800 |
|
Max speed, kts |
17 |
|
Fuel, t |
diesel oil 49 |
| Endurance, nm (kts) | 3000 (12) - 4800 (12) |
|
Armament |
1 x 1 - 76/50 Mk 10/19/20/21, 1 x 1 - 40/56 Bofors, sweeps (inc acoustic and magnetic) |
|
Sensors |
SF or SO or SCR-517A radar, sonar |
| Complement | 59 - 65 |
Ship project history: In 1938 requirements have been prepared for the small patrol ship (PC, patrol craft) which should come instead of morally and physically out-of-date ships of Eagle class. Basic purpose of this ship would be escort of coastal convoys and anti-submarine service in base area. The task provided speed not less than 22kts and an endurance of 3000(12)nm. Under the FY1938 program two "prototypes" were built: 173-ft flush-decked turbine-engined ΠΡ452 and 165-ft diesel-engined ΠΡ451 with forecastle. During trials in 1940 ΠΡ452 has shown the better seaworthiness and higher speed, however low reliability of her experimental machinery have not allowed to mass-building this in remaining the successful ship. At the same time the diesel-powered variant, ΠΡ451, also did not suit a series: unsatisfactory seagoing capacities make use of armament very difficult. It was not represented possible to correct this lack by increasing of dimensions because of imminent decreasing of speed. The matter is that in the USA then was not available diesels appropriate for installation on small ships with more than 1500hp power. In addition to complexities with machinery choice the mite in the list of problems with designing was brought by President Roosevelt, demanded to establish the second 76mm gun.
The way out has been found after study of variant of installation of diesels into the hull of 173-ft "prototype". Thus, the truth, was necessary to refuse from 22kts. Contract speed was lowered on 2kts, and on trials lead ΠΡ461 reached 21.16kts, the truth, at the displacement close to standard. Increasing, in comparison with "prototype", on 0.2m of a hull breadth has allowed to place heavier armament. The project was ready in the early 1941, and in March, 1942 Navy received first serial ships.
In November, 1940, even before the termination of works under the project of PC, the decision on building of minesweepers in 173-ft hulls was accepted. In total 18 minesweepers of Adroit class were completed. At the expense of installation of less powerful diesels and decrease of speed to 16kts it was possible to get a place for diesel-generator for magnetic sweep. As minesweepers these ships have appeared unsuccessful and in June, 1944 they were re-classified as patrols.
Modernizations: 6/1944, all: were converted to PC, - sweeps; + (3 - 4) x 1 - 20/70 Oerlikon, 2 x 4 - 178 Mousetrap DCT, 2 DCT, 2 DCR
mid-1944, 3 PC were converted to PC(C): - 1 x 1 - 40/56 Bofors, (3 - 4) x 1 - 20/70 Oerlikon; additional communication and HQ accommodations were mounted.
Naval service: PC1603 was sunk by kamikaze at Okinawa.
Force
© Ivan Gogin, 2008-10