As far as I remember the shooting rock with phaser thing was more about having a source of heat, as not to freeze to death. I can see the communicator on the c

As far as I remember the shooting rock with phaser thing was more about having a source of heat, as not to freeze to death. I can see the communicator on the chest being used as a flashlight with the powerful LED we have today. But 90s TV show prop departments would probably have had one hell of a time trying to make that work, and practical, so instead they gave everybody futuristic looking flashlights aka "palm beacons" [0] [0] https://memory-alpha.fandom.com/wiki/Palm_beacon https://memory-alpha.fandom.com/wiki/Palm_beacon