The ECDIS Chart 1 and the Colour Differentiation Test are diagrams for use by the Mariner which are provided in the form of ENC-like S-57 files.
The ECDIS chart 1 is intended to familiarise the Mariner with the symbology used on ECDIS. The Mariner shall be able to display each cell, and by cursor-pick get a read-out of the meaning of any symbol shown.
The Colour Differentiation Test diagram is intended for display using the day or dusk colour tables so that the Mariner can check that the ECDIS monitor is providing adequate colour performance. It is also used in type-approval testing. Instructions for its use are given in the sections below.
The ECDIS chart 1 includes the CHKSYM which is intended for checking the correct size of the symbols during the type approval. The width and height of the CHKSYM is 5.0 mm.
The line width of the diagonal line in the Colour Differentiation Test diagram is specified as 0.6 mm wide (i.e. 2 pixel wide with a monitor with 0.3 mm pixel pitch). The line width shall be checked during the type approval.
