TM 1-1520-240-10
8-4-5/(8-4-6 blank)
operating in these conditions, should result in the pres-
ervation of rated engine power.
8-4-41. Hovering.
Hovering over salt water at altitudes that cause concen-
trated spray into the engine inlets results in gradual pow-
er deterioration and eventual reduction of compressor
stall margin. Operation in these conditions should be
avoided or minimized. The following procedures are
grouped according to wind conditions. Maximum hover-
ing altitude, consistent with safety and mission accom-
plishment, is recommended to reduce possibility of salt
spray ingestion. Prolonged hovering over salt water
which results in spray ingestion, indicated by spray on
the windshield, must be avoided. The amount of spray
observed on the windshield is usually the best indication
of spray ingestion into the engine outlets.
a. No wind. Hovering in a no wind condition normally
results in a relatively low spray concentration at all hover-
ing altitudes.
b. Light winds (approximately 5 to 16 knots). Hover-
ing in these conditions results in the heaviest or most
critical spray concentrations. Spray can be minimized by
heading changes with reference to wind direction and
ascertaining minimum spray concentration on wind-
shield.
c. Moderate to heavy winds (15 knots and
above). Higher winds normally result in the lowest of
spray concentration at all hovering altitudes. In these
conditions, hovering can be accomplished into the wind.
8-4-42. After Flight.
Refer to Appendix C.
