Silva Terra Ranger S 38246 Mirror Sighting Compass

Silva Terra Ranger S is a mirror-sighting compass for taking bearings, with a rotating housing and map scales for 1:25,000 and 1:50,000 maps. The mirror lets you view the dial and background together, while the listed 45-degree angle assistance is intended to aid sighting. Its claimed features suit map-based hiking, particularly in open terrain.

At a glance

Mirror sighting allows the compass dial and background to be viewed at the same time when taking a bearing.
Rotating housing, rubber-grip bezel and an internal declination scale are described in the listing.
The base plate has map-measuring markings in millimetres and scales for 1:50,000 and 1:25,000 maps.
Manufacturer-described luminous markings are intended for low-light navigation. A detachable safety lanyard is also claimed.
The lid and graduation ring are described as recycled plastic reinforced with hemp fibres, with a claimed 90% reduction in carbon emissions.

Price

£29.74Save 22%

Reference price: ~~£37.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Mirror sighting is useful when taking bearings over longer distances, especially in open terrain.
The two listed map scales and millimetre map-measuring marks support map-based navigation.
The rotating housing and internal declination scale provide adjustment features for compass use.

Technical specifications

7 specifications

Identity
Brand	Silva
Model	38246

Dimensions and installation
Dimensions listed	14L x 10W centimetres
Weight listed	0.08 Kilograms

Materials and construction
Material listed	Acrylic

Navigation features
Map scales	1:50,000 and 1:25,000
Special features	Mirror Viewpoint, Rotating Case, Declination Scale, 45 Degree Angle Assist

What to know before buying

Listing details to confirm

The listing gives Acrylic as the material, while its feature text says the lid and graduation ring use REVO recycled plastic reinforced with hemp fibres. The exact material scope and construction are therefore inconsistent. The 90% emissions reduction is a manufacturer claim, not independently verified. The dimensions are listed as 14L x 10W centimetres, but no thickness is stated.

What’s in the box

Included

Compass

Who is it for?

A good fit for

Hikers and outdoor users who take map bearings and want a mirror sight for distant targets.
Map users with 1:25,000 or 1:50,000 maps who can make use of the listed scales and millimetre markings.

Less suited to

Buyers looking for a simple, non-mirror compass or a product with confirmed dimensions and material details beyond those in the listing.

Silva Terra Ranger S 38246 Mirror Sighting Compass · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 22 ratings

5 stars63%63%
4 stars14%14%
3 stars11%11%
2 stars0%0%
1 star12%12%

Only aggregate ratings are supplied, with a generally favourable overall result but a small rating sample and a noticeable one-star share. This gives limited reassurance about customer satisfaction, but does not show which features buyers liked or what prompted low ratings. The ratings do not establish how the mirror sight, map scales or low-light markings perform in use.

Frequently asked questions

Which map scales are listed for the Terra Ranger S?

The listing specifies 1:50,000 and 1:25,000 scales, and says the base plate has map-measuring markings in millimetres.

What does the mirror sight do?

The manufacturer says it lets you see the compass dial and the background at the same time while taking a bearing. It also describes 45-degree angle assistance.

Is it described for low-light use?

Yes. The listing claims luminous markings for low-light navigation, but does not specify how long they remain visible or the conditions required.