Next is MACDONOUGH (DD-351) in December of 1943. After a complicated series of refits, DD-351 returned to the Pacific combat area in Measure 21 camouflage (overall Navy Blue (5-N)). The FARRAGUT class ships all received twin 40mm Bofors mounts amidships during their 1942/1943 refits, and the earlier refits also added the Mark 49 director, visible just aft of the no.2 stack. The Mark 49 was a completely enclosed power-driven gun director originally designed as a replacement for the Mark 44 and Mark 51; ultimately it proved unsatisfactory as it was not capable of training rapidly enough to track fast-flying aircraft. Some installations included the small Mark 19 ranging radar allowing for blindfire capability, but by 1944 almost all Mark 49 directors had been retired in favor of the much lighter and simpler Mark 51 (a basic lead-computing director trained and aimed by a human operator).
MACDONOUGH retains the three 20mm Oerlikon machine cannons ahead of the pilot house, with one mount in a centerline tub ahead of the bridge. Note the pipe guards to restrict this gun's field of fire to prevent the gunner from accidentally firing into the bridge wings. This was a common modification on the mid-war units as the 20mm Oerlikons did not have interlock capability.
The ship's Mark 33 gun director for the main 5"/38 guns has been fitted with improvised supports for the Mark 4 "FD" ("Fox Dog") radar. The open topped directors did not have the ability to mount the radar ahead of the director so this clumsy solution was preferred; it shows how eager the Navy was to get radar onto as many fleet units as possible. The foremast mounts the usual SC-2 air search and SG surface search radar antennas, with a TBS tactical radio antenna on the starboard yardarm. The waveguide for the SG radar is visible below it.
Finally, another version of HULL (DD-350) in April of 1942, also in the Measure 21 scheme. The FARRAGUT class ships were only camouflaged in Measure 21 and the Measure 32 dazzle schemes during the war.
HULL shows a very typical configuration for the early war refits. A battery of four 20mm Oerlikons has replaced the original amidships 5"/38 mount (a sacrifice dictated by the King Board anti-aircraft rearmament projects, which preferred to lose 1/5th of the main gun battery vs. 1/2 of the torpedo battery). The Mark 33 director atop the pilot house has not yet received the Mark 4 radar, and the SC and SG antennas atop the mast have yet to be fitted. HULL would receive these upgrades during its next refit.
All FARRAGUT class drawings available here:
http://shipbucket.com/drawings/search?c ... ate=&view=
All USN Destroyer drawings available here:
http://shipbucket.com/drawings?category ... shipType=1