The Navy uses different types of trucks. The use
depends on the base, type of aircraft assigned, and
anticipated types of fires. Some of the trucks used by
the Navy are the Oshkosh T-3000, the P-4A vehicle, the
P-19 fire-fighting truck, and the P-25 shipboard
fire-fighting truck. Shore-based Twinned Agent Units
(TAUs)
and
Shipboard
Twinned
Agent
Units
(SBTAUs) are also used.
OSHKOSH T-3000
The Oshkosh T-3000 (fig.12-8) is a diesel-
powered, six-wheeled-drive truck with an automatic
transmission.
The operator controls consist of
power-assisted steering, air or mechanical brakes,
transmission range selector, and in-cab controls for
operating the fire-fighting system. The water storage
tank has a capacity of 3,000 gallons; the AFFF
concentrate tank holds 420 gallons. The roof turret has
a discharge rate of 600 to 1,200 gpm and an infinitely
variable pattern from straight stream to fully dispersed.
The bumper turret is electric joystick controlled with
auto-oscillation. The discharge rate is 300 gpm and it is
also
variable
pattern.
Two
15-foot,
1
3/4-inch
preconnected handlines are provided, one per side. The
handlines have a discharge rate of 95 gpm and have a
pistol grip with variable pattern.
P-4A VEHICLE
The P-4A vehicle (fig. 12-9) is diesel powered with
an optional all-wheel drive. It has a six-speed,
semiautomatic,
power
shift
transmission.
The
operator's controls has power-assisted steering, air-
over-hydraulic power boost brakes, transmission range
selector, and in-cab controls for operating the vehicle's
fire-fighting systems.
The water storage tank has a capacity of 1,500
gallons. The AFFF concentrate pumps (centrifugal) are
powered by the truck engine by means of power
dividers. The concentrate and water are carried to each
of the discharge points in separate lines and are mixed
in venturi inductors before discharge.
The P-4A is
provided with a manually maneuvered, 750-gpm
constant-flow, variable-stream roof turret.
The P-4A is also provided with a 250-gpm bumper
turret mounted in front of the cab and controlled
hydraulically from within the cab. The handline is
mounted in front center of the vehicle in a compartment
12-9
Anf1208
Figure 12-8.—T-3000 aircraft fire-fighting rescue vehicle.
