'H' markers - Winlink Hybrid Network participants. They offer RF message forwarding if local internet links are not available.
GREEN - gateway reporting normally
YELLOW - more than 2 hours since last report
RED - more than 4 hours since last report
Gateways disappear from the display after 6 hours without a report.
Service Codes determine displayed channels. "PUBLIC" is the service code for maritime and open amateur radio use, including emergency gateways that allow public access. "EMCOMM" is for emergency gateways that do not allow public access. Other codes are used by groups who wish to keep gateway information private. If your group uses a special service code, please contact your group to obtain it. The Winlink Team does not distribute that information.