safety

Download surrounding terrain, test map detail without reception, understand the position marker, and carry a usable backup.

Practise head torch controls, walking-beam settings, fit, lockout, and backup power before a late return.

Reserve time for the return, use early progress checkpoints, and agree on a firm turnaround rule before starting.

Assess phone workload, route consequences, cable compatibility, and independent navigation before adding backup power.

Organise familiar dressings, blister supplies, gloves, and personal medications around the group and distance from help.