Chart No. 1 · N 2.1
Restricted / prohibited area boundary
Areas & limits
A dashed line with T-shaped ticks bounds a restricted area — look for the legend saying what is banned.
What it means
A dashed limit whose dashes carry small perpendicular ticks (T-shapes, pointing into the area) bounds a restricted area (N 2.1); the same line screened in magenta bounds an area where entry is prohibited (N 2.2). A legend states the restriction.
Why it matters
Restrictions range from 'no anchoring' to 'no entry at any time' (security zones, firing ranges). The T-ticks point into the restricted side — read the legend before assuming you may cross.