The Silva 85 Compass comes calibrated for Northern Hemisphere countries.Silva 85 Compasses are stable for small, fast boats. It has a memory ring for setting the desired course.Clear scales and quick readability make this compass perfect for navigating in high speed. The flat-bottom design enables flush installation without making large holes in the boat. A common configuration is two 85 compasses, one on each rail. This enables you to move around more freely in the boat.Thanks to the excellent dampening of the compass card, Silva 85 Compasses are suitable for high speeds and rough conditions.FeaturesCurved lubber lines: Accurate reading from different anglesMemory ring: Set the desired courseCompact size: Small and flexibleSpecificationsArticle Number37171-0001Accuracy 1 (17.8 mils)Apparent card diameter85mmBuilt-in compensatorNoCard typeFlatCompatibilityPowerboats, SailboatsDimensions67x120mmGimballed cradleNoHeeling angleRoll: 30 Pitch: 30Heeling angle scaleNoIlluminationNoLubber linesCentre and 2x side view at 45MaterialABS, AcrylicMemory ringYesMountingFlushMounting angle-20 to +20Protective coverNoTemperature operating range-10C to +70CVariantMagnetic NorthWeight300g