A short little guide to communication devices

May 2024

Read more from

May 2024

Plan A: Self-rescue
Plan B: Communication options for outside help

One-way Satellite Messenger
*Some connect to your phone to become two way, but don’t rely on that function.

  • One way call – unable to communicate with rescuers
  • Replaceable batteries
  • Pre-set messages
  • Global coverage usually strong
  • Purchase + subscription
  • Tracking functions

Two-way Satellite Messenger

  • Two-way call though device slow, faster if connected to phone
  • Rechargable, long life
  • Pre-set messages + custom
  • Global coverage usually strong
  • Purchase + subscription
  • Tracking & GPS functions

Satellite Phone

  • Two way call, fast communication
  • Rechargable but not in the field
  • Concise message conversation as connection breaks frequently
  • Global-terrain & weather sensitive
  • Purchase + plan, expensive
  • Extremely sensitive to your position. If you have connection, do not move!

Personal Locator Beacon

  • One way call – unable to communicate with rescuers
  • Multi-year, not replaceable or rechargeable
  • No messaging – one hit wonder
  • Global
  • Purchase, expensive one time

Cellular Phone

  • Two-way call in service, limited in SOS
  • Rechargable, short life
  • Unlimited messaging in service, limited in SOS
  • Extremely unreliable coverage, SOS only available in some countries for new Apple phones only
  • Most already own
  • Fragile & used for many other functions, not recommended as sole emergency device

Radio

  • Two way
  • Rechargable but not in field
  • Messaging can be very clear or broken
  • Local coverage only, affected be terrain
  • Purchase
  • Can catch others in area for help
  • Needs to be programmed for channels, need a license in some areas/channels

Smoke signals NOT (generally) recommended.

Before you go! Leave a trip plan with someone reliable.

  • Where you are going
  • Who is going
  • What equipment you have
  • Expected return date & time
  • Who & when to contact if overdue
Rachel Davies

About the author

Rachel Davies

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