For thirty years I have used the same Silva Type 30 Compass initially for navigation and then Race Management. Unfortunately the prism has lost a lot of its mirror coating and has had to be replaced by an Iris 50. If you know anyone who could fix my old Silva – get in touch.
In the UK and Ireland this is the one Compass that is universally available and almost indestructible: the Plastimo Iris 50.
It comes in a variety of colours, has a rubber surround and lanyard. In this type of compass you sight over the top focusing on the distant object. Easy to use and will cost around £60.00
I have found this in use all over the world. Works for me. Great choice for mark laying teams as it is very robust.