The Pacific War Online Encyclopedia
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|Tonnage||24,830 tons fully loaded
|Dimensions||553' by 75' by 32'
168.6m by 22.9m by 9.8m
|Maximum speed||18 knots|
4 0.50 machine guns
||STS splinter protection only
around guns, handling rooms, and bridge
||2-shaft geared turbine
4 Babcock and Wilcox boilers
|| Late 1942: Light antiaircraft
upgraded to 1x2 1.1"
AA guns, 6x1 20mm
Oerlikon AA guns.
1944: Light antiaircraft upgraded to
20mm guns and
were completed from 1939-1942 as
T3-S2-A1 tankers. The
twelve T3-S2-A1 tankers were
built for Standard Oil with
and technical assistance from the
Navy to ensure that the ships would be usable as fleet oilers in
event of war. This required more powerful machinery and a better
form to permit a higher sustained speed than was the norm for
tankers. As it turned out, the Navy was so anxious to obtain
fleet oilers that it took over the contracts for the first few T3-S2s that were completed.
became the Cimarron
class fleet oilers.
At the time of completion, they were the fastest
tankers ever built in U.S. yards
and among the largest in the world. Their hull form was developed
Navy test basins and included a bulbous clipper bow to reduce wave
performance actually exceeded the design specification, at 16,9000
and 19.28 knots. They were armed and equipped with underway
replenishment gear at their first refits. One Cimarron
simultaneously refuel two warships, one on
each beam, while underway at
speed in calm to moderate seas.
Navalization of the ships involved greatly
increasing the berthing space for the much larger Navy crews,
installing underway replenishment gear and armament, and adding
boats and Navy communications gear. The ships were also modified
carry lubricating oil, diesel oil, and gasoline in addition to fuel
A typical loadout for a Cimarron
Fleet in late 1943
was 80,000 barrels (12,700,000 liters) fuel oil, 18,000 barrels
(2,860,000 liters) aviation gasoline and 6782 barrels (1,080,000
liters) diesel oil.
A second group of oilers were
1943-45 on the basic Cimarron
plan. Some authors list these separately as the Ashtabula
class. Their chief distinction from their earlier sister ships is
the shortage of 5"/38 guns led to their being armed with just one
and four 3"/50 guns
inferior fire control ("follow the pointer" system).
|Neosho||Pearl Harbor||Crippled by aircraft 1942-5-7 in the Coral Sea; scuttled|
|Mississinewa||arrived 1944-6-30||Sunk by kaiten on
1944-11-20 at Ulithi
|Severn||arrived 1944-8||Assigned to use as water tanker
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