Choose a dive site, or enter a latitude and longitude, or an MGRS grid. Those are separate checks. Leave the coordinate fields empty to use the dive site. A map click fills decimal degrees and does not look up a place name. Example: 26.9342, -80.0942, or 17R NK 89923 79469. The search stays within 25 nautical miles. Sites with no buoy in that distance are left off the list. The list is stored, not a live lookup.
Times start at UTC. The box keeps that choice in this browser for 30 days and does not change the shop location. A visit does not pull buoys until you check. Open the buoy again after changing the zone.
