A heliograph signal mirror can reflect sunlight to attract attention from aircraft and rescue teams over distances exceeding 15 kilometres. Lightweight, durable, and requires no batteries or fuel.
A signal mirror is one of the most effective long-range signalling devices available, capable of producing a flash visible to aircraft and ground search teams from over 15km away on a clear day. Unlike flares which burn out in seconds or whistles that carry only a mile, a mirror can signal continuously for as long as the sun is shining. Search and rescue helicopters and coastguard aircraft are specifically trained to spot mirror flashes. In the UK, where mountain rescue and coastguard operations are frequent, a signal mirror weighing just 50 grams could be the item that gets you found. It never runs out of power and never expires.
Use a signal mirror whenever you can see or hear a search aircraft, helicopter, or distant rescue team during daylight hours. It is particularly effective in open UK environments — moorland, coastal paths, mountain ridges, and open water. Even on overcast days typical of the UK, a mirror can catch sufficient light to produce a visible flash. Combine mirror signalling with other methods such as a whistle or bright-coloured clothing laid out as a ground signal for maximum visibility.
A signal mirror with a central sighting hole or retroreflective aiming grid allows you to accurately direct the reflected flash at a specific target. Without an aiming aid, directing a flash at a distant aircraft is extremely difficult. This feature transforms the mirror from hopeful to precise.
Glass mirrors produce a significantly brighter and more focused reflection than plastic alternatives. Polycarbonate mirrors are lighter and less fragile, but their reflectivity degrades over time and with scratching. For maximum signalling range, a glass mirror with a scratch-resistant coating is superior.
A mirror of approximately 7.5cm x 10cm offers the best balance between signalling power and packability. Smaller mirrors are easier to carry but produce a weaker flash. The mirror should come with a protective sleeve or pouch to prevent the reflective surface from scratching in your pack.
Aiming a signal mirror accurately is a skill that requires practice. In a real emergency is not the time to learn. Practise the sighting technique at home by reflecting sunlight onto a distant wall or tree. With the sighting hole method, you should be able to hit a target at 100 metres consistently.
While direct sun produces the brightest flash, a signal mirror can still produce a visible reflection on hazy or partially overcast days. Even reflected light from bright cloud cover can be directed at a target. Do not dismiss your mirror just because the sun is not fully out — try it anyway.
A compact signalling mirror that reflects sunlight to flag down rescuers over long distances. A featherweight backup way to be seen when you're lost or stranded.
A genuinely waterproof top-spiral notebook whose pages shed rain, sweat and mud so pencil and all-weather pen notes survive a soaking. Reach for it when you need to record a grid reference, a phone number or a casualty's details in weather that would turn ordinary paper to pulp. The 3x5 inch size drops into a jacket or grab-bag pocket.
An entry-level baseplate compass aimed at people learning to navigate with a paper map. It covers the essentials — a direction-of-travel arrow, a rotating bezel and a clear baseplate for taking bearings — without the mirror or sighting extras of pricier models. A sensible first compass to keep in a grab bag or to teach map-reading with.
A professional-grade navigation compass with map scales and a clinometer, trusted by rescue teams. The pick for serious hill and expedition navigation.
A compact baseplate compass from Silva, one of the most established names in outdoor navigation. It has 1:25k and 1:50k romer scales printed on the plate for measuring distances straight off an Ordnance Survey map, so it is a sensible first compass for anyone learning to navigate without relying on a phone.
A proven baseplate compass with a sighting mirror and map scales for accurate navigation when phones and GPS die. A dependable classic trusted by hikers and the military.
A proper baseplate compass with a rotating housing and 1:25k/1:50k romer scales, the kind you'd pair with an OS map when the phone dies or the fog closes in. Silva is the reference brand for UK hillwalking navigation, and this is a dependable everyday model rather than a novelty.
Magnetic navigation instrument for finding direction without batteries or signal. The most reliable navigation tool that exists.
A high-decibel survival whistle carries further than the human voice and requires minimal energy to use. The simplest and most reliable signalling device for attracting rescue in any conditions.
Master traditional navigation skills using Ordnance Survey maps and a baseplate compass — essential backup skills for when your phone battery dies on the British hills.
Lost or in trouble outdoors? Learn how to call for help in the UK, share your exact location, and use a whistle, mirror, torch and bright kit to get found and rescued fast.
