It’s very rare for me to add any item to my “base” hiking kit. (It’s too heavy already.)
The new essential must be very valuable. Or very light.
The All-in-one Map Tool is both. I carry it with my map and compass.

Bob Moseley from Brooks-Range Mountaineering Equipment Co. asked me to test this award winning product.
I took it with me on a solo kayak hiking trip out of Bamfield, British Columbia on the west coast of Canada. Since the weather was good, I was able to paddle directly to the Deer Island group, the closest to town.

It was a great, relaxing trip. I saw bear, seals, sea lions and nearly stepped on a baby puffin.
Normally mornings on this, the “Shipwreck Coast” are fogged in. On a previous trip to the nearby Broken Group Islands we were a number of times confused in the fog. It’s essential to know where you are on the map, have an exact compass bearing, and a good estimate of your speed and distance to the next island.
The All-in-one Map Tool is ideal in this situation as it has 6 different, easy-to-read map scale rulers to help estimate distance.

More photos from this trip – flickr
Sadly I had atypically excellent weather and did not need to do any dead reckoning in the morning.
So I’ll take it heli-hiking into the Tombstone Mountains in the Yukon in August. Certainly I should have a good chance to get lost there, having to rely on Topo, compass and map tool for survival.
All-in-one Map Tool – US$18 – Brooks Range Mountaineering Equipment Co.