Felt Chart Markers for marking track lines etc. on laminated charts and Pilot's Boards.
Select from a pack of 4 (red, blue, black and green), or a pack of 6 (red, blue, black and green, orange and brown).

Pen widths available are:
Fine (0.6mm wide) or
Medium (1.0mm wide).

Select watersoluble for easy removal from laminated charts with water or permanent which is Waterproof and smudge-proof and requires a solvent to remove.
(Nail polish remover type of thing.)

Staedtler pens are universally accepted as the best pens on the market for chart marking and feature a Neutral-smelling, Fast-drying ink with Brilliant Light-fast colours.
DRY SAFE: can be left open for up to 2 days without drying up (test ISO 554)