Brass Rolling Rule - 18"/450mm

Supplied to Naval personnel worldwide
Manufactured from brass and stainless steel
Quality control tested to roll true to within 1mm over 2m
Finished in black
Supplied in a wooden case
Hexagonal wrench supplied for re-adjustment

Middy Instructional - Bar Parallel Rule 400mm

Budget version of the Captain Fields' Pattern Parallel Rule
Excellent buy for use in the classroom
Manufactured from 6mm acrylic 
Incorporates rigid aluminium links

Captain Fields' Pattern - Bar Parallel Rule 600mm

Divided with protractor markings (double reading) and compass points
Manufactured from high quality 6mm acrylic
Bevelled on all four edges with solid brass links
All other metallic parts are manufactured from non-corrosive materials
Rubber pads are fitted to the underside to prevent slipping

This is a quality 8 inch chart pencil compass made in India of solid brass.  It does not include a pencil, which is sold separately.  Chart pencil compasses are useful for drawing ranges on paper charts.

This extra-long solid brass pencil compass is perfect for the professional navigator using large paper charts.