When the Mist Comes Down

The hills fall silent when cloud descends. Paths vanish, ridgelines dissolve into grey, and your sense of direction starts to play tricks. This is when a map and compass become your primary tools. The skills are simple to learn, and with practice they will carry you safely through a Scottish haar or a sudden Lake District downpour. The core routine is straightforward: set the map, take a bearing, and walk on a steady count. Master those three steps and you will stay on track when everything else disappears.

Setting the Map

Setting the map means aligning it with the ground so features match the terrain. In clear weather you can do this by eye, but in poor visibility you need your compass. Place the compass flat on the map with its edge along a grid line, or with the orienting lines inside the bezel parallel to the grid lines. Make sure the direction of travel arrow points to the top of the map. Then rotate the map, not the compass, until the red end of the magnetic needle sits inside the orienting arrow. The map is now set. Remember that grid north and magnetic north differ; the difference, called magnetic variation, is printed in the map's margin. In the UK this is currently small—often between zero and five degrees west—but you should still account for it when taking bearings. Setting the map also lets you read contour lines and relate them to the slope under your feet, which is invaluable when you cannot see far ahead.

Taking a Bearing from the Map

To take a bearing, place the compass on the map with its long edge passing through your current position and your destination, with the direction of travel arrow pointing towards the target. Rotate the bezel until the orienting lines inside it are parallel with the map's grid lines, and the orienting arrow points to the top of the map. Read the number at the index line—that is your grid bearing. Now adjust for magnetic variation: if the variation is west, add it; if east, subtract it. The result is your magnetic bearing, the number you will walk on. Double-check your arithmetic, because a ten-degree error will send you far off course over a kilometre. Hold the compass flat and away from metal objects like belt buckles or mobile phones, which can deflect the needle.

Walking on a Bearing with a Steady Count

Hold the compass in front of you, flat and level. Turn your body until the red end of the needle sits inside the orienting arrow. The direction of travel arrow now points along your bearing. Look up and pick a feature in that direction—a rock, a patch of heather, even a darker smudge in the mist—and walk to it. Then repeat. In poor visibility you will need to do this every few metres. To keep a straight line and measure distance, use a steady count. Count double paces: every time your left foot lands, that is one. On flat ground, most adults take about 60 double paces to cover 100 metres, but you must calibrate your own pace on different terrains. Uphill, into wind, or over boggy ground, your pace shortens and your count per 100 metres increases. Count out loud if it helps. The count does two jobs: it stops you drifting off line, and it tells you how far you have travelled since your last known point. If you need to walk 400 metres on a bearing of 270 degrees, and your pace count is 65 double paces per 100 metres, count down from 260 double paces and you will know when to stop.

Aiming Off, Handrails and Other Tricks

Even with good technique, small errors creep in. Aiming off is a classic solution. Instead of aiming directly at a target like a bridge, deliberately aim a few degrees to one side. When you hit the stream, you know which way to turn to reach the bridge. Handrails are linear features—a wall, a fence, a stream, a ridgeline—that you can follow using your compass to keep on track. If your route runs alongside a wall, walk parallel to it, checking your bearing regularly. Back bearings are another check: turn around and take a bearing on a feature behind you. If it matches your original bearing plus or minus 180 degrees, you are on line. Contour counting is useful too: if your map shows three contour lines to a plateau, count them as you climb. And never forget the simplest tool: stop, think, and look at the map. Rushing in poor visibility is how mistakes happen.

Practise Before You Need It

The time to hone these skills is not in a whiteout. Start in a familiar field on a clear day. Set a bearing, walk 100 metres on a steady count, and see how close you get to your target. Then try it with your eyes closed. Learn your pace count on grass and on steep ground. Practise setting the map and taking bearings until the sequence is automatic. When you find yourself in mist, you will be calm and confident. Carry a waterproof map case and a quality baseplate compass. Tell someone your route and expected return time. Poor visibility is not a reason to turn back—it is an invitation to navigate well. With a map, a compass, and a steady count, you can keep walking safely and enjoy the hills in any weather.