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Sea Survival revision module 6 of 8

SIG

Flares, EPIRB, PLB, SART, and AIS

Distress signalling choices, strengths, limitations, and safe use.

flaresEPIRB

4 guided lessons · 8 practice questions · 8 flashcards

3 outcomes · self-guided revision
  • Explain distress signalling choices, strengths, limitations, and safe use.
  • Apply flares to a realistic onboard situation.
  • Recall the core check: alert rescuers first, then help them home in.

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Lesson routeDistress Signalling Layers0/1 read

Lesson 1 of 1

Distress Signalling Layers

Sea survival uses layers of alerting and locating equipment. VHF/DSC, EPIRB, PLB, AIS MOB, SART, flares, lights, mirrors, whistles, torches, and visual signals each have different jobs.

The safest plan is not to rely on one device. Batteries fail, antennas are low, flares expire, and search units may need both electronic and visual cues.

  • Alert rescuers first, then help them home in.
  • Register beacons and keep details current.
  • Check batteries, expiry dates, and service intervals.
  • Brief the crew on what each device does.
EquipmentMain jobImportant limitation
EPIRBGlobal distress alert and locationMust be registered and correctly activated
PLBPersonal distress alert and locationNeeds registration and clear sky view
AIS MOBAlerts nearby AIS receiversRange depends on antenna height and receivers
FlaresVisual attention/locationShort duration and hazardous if misused
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