Silva Expedition S Mirror Sighting Compass, Model 37454

Silva Expedition S is a mirror-sighting compass, model 37454, intended for experienced navigators. Its mirror lets you see the compass dial while aligning a reference point, while the listed map scales and detachable scale lanyard support map work. Customer feedback also flags mixed views on size, durability and declination adjustment.

At a glance

Mirror sighting lets you view the compass dial while aligning a reference point.
Rotatable housing has a rubber-grip bezel and a declination scale inside the capsule.
Baseplate includes millimetre map measuring and scales for 1:50k, 1:25k and 1:24k maps.
Luminous markings are described for low-light navigation. The detachable scale lanyard also works as a ruler.
Listing describes a 45-degree angle-assistance feature in the mirror sighting function.

Price

£39.95Save 15%

Reference price: ~~£47.00~~

Price checked: 14 Nov 2026

View offer

Pros and cons

Pros

Mirror sighting combines dial reading and reference-point alignment in one view.
Three stated map scales and millimetre measuring support map-based navigation.
Detachable scale lanyard can double as a ruler.

Cons

Customer feedback reports concerns about the orange plastic bezel cracking. This is a reported durability concern, not a verified defect rate.

Technical specifications

7 specifications

Identity
Brand	Silva
Model	37454

Navigation features
Map scales	1:50k, 1:25k, 1:24k

Dimensions and installation
Mounting type listed	Tabletop Mount
Dimensions listed	10.8L x 6.4W centimetres
Weight listed	0.09 Kilograms

Materials
Material listed	Acrylic

What to know before buying

The listing describes features including a clinometer, slope card, recycled PET scale lanyard, graduated mils and degrees, magnifying glass and rubber feet. Confirm which details apply to model 37454 and the selected listing before purchase, as the product description and feature details are not fully aligned.

What’s in the box

Included

Compass

Who is it for?

A good fit for

Experienced hikers and navigators who use a sighting compass with maps.
Buyers who want map scales, low-light markings and a lanyard that can serve as a ruler.

Less suited to

Buyers who need customer feedback to establish consistent bezel durability or declination-adjustment performance.
Beginners seeking a product described for casual or introductory navigation.

Silva Expedition S Mirror Sighting Compass, Model 37454 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 825 ratings

5 stars75%75%
4 stars13%13%
3 stars4%4%
2 stars2%2%
1 star6%6%

Customer feedback highlights perceived accuracy and functionality, with some describing the compass as useful for demanding route finding by day or night. Size and readability divide opinion, and feedback also raises concerns about bezel durability and mixed experiences with declination adjustment and value. For map users, the listed sighting mirror, map scales and declination scale are relevant features, but feedback does not establish how consistently they perform.

Positive themes

Customers describe the compass as accurate and functional.

Negative themes

Customer feedback raises concerns that the orange plastic bezel may crack.

Mixed feedback

Customers disagree about whether the compass feels compact or smaller than expected.
Readability, value for money and declination adjustment receive mixed feedback.

Frequently asked questions

What kind of compass is the Silva Expedition S?

It is described as a mirror-sighting compass for experienced navigators. The mirror lets you see the dial while aligning a reference point.

Which map scales are listed?

The listing gives 1:50k, 1:25k and 1:24k scales, as well as millimetre map measuring.

Can it be used in low light?

The listing says its luminous markings support navigation in low-light conditions.

What do customers report about the compass?

Feedback describes positive views of accuracy and function, alongside mixed comments about size, readability, durability, value and declination adjustment. These are customer perceptions, not independently verified performance findings.