NATOPS Dipping

Question 1

Ch 2

The ALFS cable angle sensors measure the angular displacement of the cable from ________ relative to the aircraft orientation where latitude corresponds to _________ and longitude corresponds to the ________.

Answer 1

Center of the funnel

Roll direction
Pitch direction

Question 2

Ch 2

While the dome is submerged, the AFCS maintains the cable perpendicular to the _______ while keeping the aircraft _______.

Answer 2

Water surface
In a steady hover

Question 3

Ch 2

Each time the dome raising/lowering is _______ the cable angle signals are ___________.

This decoupling lasts for _______.

What does the decoupling do?

Answer 3

Stopped or started in the water
Decoupled from the AFCS by the RMIU

Approximately 9 seconds

Prevents erratic helicopter movement due to waves set in motion along the transducer cable as the dome starts/stops

Question 4

Ch 2

While the dome is submerged, the display reverence’s the cable’s vertical a gable relative to the _______. What is this called?

However, the CABLE ANGLE AT LIMIT alert continues to be triggered based on what?

Answer 4

Surface of the water

Cable verticality

Cable’s position in the funnel

Question 5

Ch 2

When the dome is not submerged, the cable angle display references the cable’s position relative to ________ and the CABLE ANGLE AT LIMIT alert _________.

Answer 5

The center of the funnel

Is suppressed

Question 6

Ch 2

Tick marks and rings on the cable angle display

Answer 6

Tick marks: 2 deg per tick
Inner ring: 4.25 deg
Outer ring: 8.5 deg

Question 7

Ch 2

Cable angle position is available only when _______.

Answer 7

the RMCU SEATED indicator is extinguished

Question 8

Ch 2

Warning associated with 8.5 deg outer ring

Answer 8

If reached while dome is leaving the water, there is increased risk of the dome striking the aircraft and rotors which may result in injury/death

Question 9

Ch 2

Caution associated with 4.25 deg ring

Answer 9

If exceeded as dome is leaving the water during raise operations, increased risk of dome striking the aircraft which may result in equipment damage.

Question 10

Ch 2

If cable swing is excessive, the aircrewman should …

Answer 10

Stop raising the dome

Question 11

CABLE ANGLE AT LIMIT

Answer 11

Cable angle has exceed 7.5 deg total deflection relative to the center of the funnel (can occur due to headwinds, crosswinds, currents, etc)

Question 12

The CABLE ANGLE AT LIMIT alert displays independent of what and why?

Answer 12

Independent of the Cable Angle Display since the display presents dome drift by subtracting aircraft pitch and roll

Question 13

Ch 2

Changing depth while the CABLE ANGLE AT LIMIT alert is present may cause…

Answer 13

Cable and/or funnel damage from contact friction

Question 14

Ch 2

Cable angle mode defaults back to hover mode when?

Answer 14

When dome is raised through 27 +/- 12 ft of water depth provided override is not on

Question 15

Ch 2

Cable angle LAT/LONG fail advisory

Answer 15

Failed axis reverts from cable angle hover to hover mode. The remaining axis is fully functional. Press to reset.

Question 16

SUBM OVERRIDE

Answer 16

Provides override capability of the 27 +/- 12pm submerge requirement to engage cable angle hover mode

Question 17

Ch 2

Conditions required for cable angle hover mode engagement

Answer 17

1. Groundspeed of +/-5 knots
2. Altitude hold w/ in 10’ of selected altitude
3. Dome wet indication

Question 18

Ch 2

When the AFCC decouples the cable angle sensors when raise/lower is stopped, what lights flash?

Answer 18

CALBE ANGLE-ON
ENGAGED light

Question 19

Ch 2

LAT VEL and LONG VEL potentiometers on AFCS control panel in cable angle hover mode

Answer 19

Pots are inop in Cable Angle Hover mode

Question 20

Ch 2

How to use submerge override

Answer 20

If cable angle hover mode fails to engage with dome submerged, press SUBM OVRD and then press CABLE ANGLE

Question 21

Ch 2

If submerged override is selected, disengage cable angle hover as the dome is raised through ______ to prevent ______.

Answer 21

27 +/- 12pm water depth
Sever aircraft oscillations once dome breaks the water surface

Question 22

NATIP: Alternative modes for raising the dome (First 2 numbers in the code and what mode is recommended for recovery)

Answer 22

• 10XX and 20XX– Run BIT. No recovery mode recommended
• 11XX and 21XX– SAFETY OVRD for 4 seconds until OVERRIDE light illuminates and follow normal hyd recovery procedures.
• 12XX and 22XX– Use AUX Electrical mode
• 13XX and 23XX– Use AUX HYD mode

All RMCU issued error codes begin with a 1 or 2. 1 indicates issued by the RMIU. 2 indicates issued by the RMCU