SECTION VIII. WATER OPERATION LIMITATIONS
5-8-1. WATER OPERATION LIMITATIONS.
5-8-2. Night Operation on Water.
Night operation on water is permissible provided:
Both AFCS are operational (ALT Hold and Head-
ing Select not required for night operation on water).
Pilot and copilot radar altimeter systems are op-
A visible horizon is present at the landing site.
Two or more highly visible, stationary objects are
on the water surface to provide necessary visual cues for
5-8-3. Sea State Limits.
Operation on water is restricted to a maximum of Sea
State 2. Refer to table 5-8-1 for information on sea
5-8-4. Operation Time Limit.
Operation on water is restricted to 30 minutes total flota-
tion time without draining the helicopter.
5-8-5. Gross Weight Limitations.
Maximum gross weight for water operations is as follows:
Normal operations 36,000 pounds.
Emergency rescue missions 46,000 pounds.
5-8-6. Taxiing Limitations.
Taxiing will not be conducted in water conditions above
Sea State 1 or in wind above 6 knots. Fast taxiing will be
conducted in a straight line only and to a maximum speed
of 10 knots when the lower nose enclosure is left in the
5-8-7. Landing Limitations.
Water landings can be performed within the limitations
presented on fig. 5-8-1. The touchdown speeds present-
ed do not reflect indicated airspeed but actual forward
velocity at touchdown. Running landings will only be
conducted onto calm water. The ramp, lower rescue
door, and main cabin door shall be closed during water
landing. Water landings are prohibited when fuel in the
main tanks is less than 50 percent.
5-8-8. Rotor Starting and Shutdown Limitations.
Rotor starting or shutdown will not be conducted when
water conditions exceed Sea State 1 or wind exceeds 6
knots. maximum gross weight for starting and shutdown
is 28,550 pounds.
Figure 5-8-1. Water Landing Speed Limitations Up
To 46,000 Pounds gross Weight
Table 5-8-1. Description of Sea States
Sea like mirror (calm)
Less than 1
Ripples with appearance of scales; no foam crests
Small wavelets; crests of glassy appearance, not