Doctrine // the why
MissionMap and compass are primary. Phone Gaia/OnX offline is secondary. inReach Mini 2 sat-comm is tertiary and SOS-only for nav reference. The Garmin Tread XL Overland Edition lives in the Tacoma — vehicle nav, not pack nav. ABC watch (Casio Pro Trek) is wrist-worn redundancy for altimeter / barometer / compass data without unholstering anything.
Capability Redundancy // two is one, one is none
Primary
Topo map + Suunto MC-2 G mirror compass
Secondary
iPhone · Gaia GPS / OnX Hunt offline downloads
Tertiary
Garmin inReach Mini 2 · sat-comm with location ping
Wrist redundancy
Casio Pro Trek ABC watch · alt/baro/compass
Vehicle
Garmin Tread XL Overland Edition · in Tacoma, NOT pack
Contents // 9 items
| Item | Qty | |
|---|---|---|
| Compass | ||
| Mirror compass — Suunto MC-2 G · declination-adjustable | 1 | |
| Backup compass — Silva Ranger or button | 1 | |
| Maps | ||
| Topo maps printed · USGS 7.5' on Rite-in-the-Rain · per AO | 1 set | |
| Map case waterproof — Sea to Summit | 1 | |
| Reference + recording | ||
| Pace beads | 1 | |
| Notebook — Rite-in-the-Rain #311 | 1 | |
| Pen all-weather — Fisher Space Pen | 1 | |
| Laminated AO summary card · landmarks, ridgelines, escape bearings | 1 | |
| Wrist-worn | ||
| ABC watch — Casio Pro Trek | 1 | |
Refill Triggers // what makes you restock
- New AO plannedPrint fresh USGS 7.5' quads to Rite-in-the-Rain. Update laminated AO card with landmarks / escape bearings. Pre-download Gaia layers.
- Compass damaged or impreciseReplace immediately. Verify declination setting against known reference.
Service Log // chronological
- 2026-04-26Built v1.0 baseline · compass + watch Have, maps printed per AO — MJR
- — · — awaiting next entry