Climb a lookout to chart 5 km of sea; a lit lighthouse shows the shoals at night.
1A lookout on a cape: «Land» by it (key L). The chart marks it ▲ — red until climbed, grey after.
2«Climbing the lookout»: 15 seconds. Islands, reefs and wrecks within 5 km go on the chart and the fog lifts there (60 % of it if called off after half). Again after 2 hours.
3The chart's key explains the rest: a lit lighthouse shows shoals and reefs in its light, 3.5 km, by night. Crown lights always burn; in contested waters a keeper lights his for 30 minutes — pay him («Keeper») at dusk or by night.