If you need a tough compass built for quick land navigation, then the military-grade
Cammenga CMMG Official US Military Tritium Lensatic Compass is the one to get.
When it comes to hiking and camping, many people favor mil-spec kit, and for good reason: This gear tends to be very functional and built to incredibly demanding standards for use in notoriously harsh environments. A lot of USGI stuff, like the super-rugged CMMG Official US Military Tritium Lensatic from Cammenga, is also manufactured right here in the US without the fat price tag that often accompanies name-brand professional-grade equipment.
Pretty much all baseplate compasses have a housing filled with liquid, which helps to dampen needle movement for quicker and more accurate readings. Instead of a needle suspended in fluid, the Cammenga lensatic uses a flat dial that is kept stable using copper induction. This works in such a way that if the compass is damaged, the dial will likely still function just fine, whereas a fluid-filled compass might be rendered less operable (or entirely inoperable) if its housing cracks and fluid leaks out.
Liquid-filled compasses are also more prone to going wonky in extreme temperatures due to fluid expansion and contraction, another instance where a lensatic compass shines. It should come as no surprise, then, that lensatics are favored by military forces including the US Army owing to their resilient design.
One look at the OD green Cammenga is all you need to know that it's purpose-built for serious use. It's bulkier and heavier than your standard baseplate, but if you want a "go to war" compass (figuratively speaking), this is the one.
Aside from its tough-as-nails design, the Cammenga lensatic is also favored by troops due to its utility for navigating quickly through rough and potentially hazardous terrain. "Lensatic/prismatic" actually refers to the built-in sight, which you align with a distant landmark while calculating your azimuth using the flip-up magnifying lens to read the dial which is marked in both degrees and mils. Once you have a bearing, you move to the objective, similar to how a mirrored compass operates.
One drawback to this design is that it lacks a declination adjustment, so you'll have to control for this manually when plotting a course. It's easy enough to do: Know the local difference between magnetic and true north and factor this into your bearing.
It does have bright tritium self-illumination that never needs to be charged. At $70, the Cammenga lensatic is fairly expensive compared to our other picks, but it's worth every penny and competes with professional-grade compasses that cost twice as much or more.
Pros: Built like a tank, made in the US to demanding military specifications, lensatic sight is great for quick navigation, long-lasting tritium illumination makes it usable in the dark without charging
Cons: Heavy, lensatic design lacks a declination adjustment
Buy the Cammenga CMMG Official US Military Tritium Lensatic on Amazon for $86.71