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RPIC Station AE Manual
Appendix B. Abbreviated Emergency Procedures
Abbreviated Emergency Procedures
Dual Loss of Navigation Systems and Link

Dual Loss of Navigation Systems and Link

Andi Lamprecht Andi Lamprecht ·· 2 min read· Draft
Dual Loss of Navigation Systems and Link
WARNING: Without RPIC intervention Simultaneous GPS and Link Loss will result in the aircraft immediately entering Land Mode. Due to the aircraft's inability to maintain its position, with or without RPIC intervention, any of the following safety critical outcomes are possible: minor injuries, minor damage to manned aircraft, substantial damage to unmanned aircraft (MINOR)

INDICATIONS

  1. Warning Message: “Failsafe Enabled: No Global Position”, or
  2. Warning Message: “Failsafe Enabled: No Local Position”
  3. Simultaneously occurring with GCS Message “Loss of Comms” or aircraft generally unable to be commanded.
  4. Stale Telemetry, aircraft position no longer updating on GCS display

FAILSAFE BEHAVIOR

When there is Loss of GPS and Loss of Link simultaneously, the aircraft autopilot will command the aircraft to immediately land. The aircraft, due to the Loss of GPS condition, will be unable to maintain its current lateral position and will drift while landing. The lateral velocity of the aircraft will increase as windspeed increases. Upon landing, the aircraft will disarm.

In the event that the aircraft collides with an obstacle or obstacles during its descent, the parachute recovery system will activate if the parachute maneuvering limitations are exceeded.

PROCEDURE

EMERGENCY GPS AND LINK LOSS ANNOUNCE

WARNING: Dual Loss of GPS and C2 will result in the aircraft entering LAND Mode. During landing, the aircraft may drift depending on wind effects. The condition may result in damage to or destruction of equipment, loss of mission effectiveness, or injury to persons.

If Uncrew Link Not Re-established After 15 Seconds:

Record last known location — NOTE B.A.T.H.S.

AIRCRAFT — SEARCH, RECOVER

Procedure Complete

If Uncrew Link Re-established:

GPS Status Indicator INSPECT

If GPS Indicator Displays Full Connection:

Uncrew: Return to Home SELECT

Procedure Complete

If GPS Indicator Does Not Display Full Connection:

Refer to GPS / Compass Failure Procedure, Section 4.2.5.1

Procedure Complete
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