The Chart Correction Template includes stencils for Region A & B IALA Maritime Buoyage symbols that are required for updating and correcting nautical charts. Keeping charts updated ensures the safety of your crew and vessel.  Designed for use with a fine-line pen, corrections to nautical charts can be made neatly and quickly with this simple-to-use stencil.  These corrections then become a permanent part of the chart. Corrections  should  be  made  in  ink  so  they  will  not  be accidentally  erased  when  you  are plotting courses on the chart.  Please reference US Nautical Chart No. 1 or UK Admiralty Chart 5011 for assistance with symbol identification. This is an exact replica of the Chart Correction Template formerly prepared and published by the National Geospatial Intelligence Agency (NGA).

Constructed of durable, flexible plastic
Lifetime warranty Length: 8.5 in (21.59 cm), Width: 4 in (10.16 cm), Height: 0.1 in (0.25 cm)