US Amateur/Ham Radio Operators will be active along with Emergency Services providing communication assistance and public service nets using 80m, 40m and 20m bands.
American operators are aware that Part 97.101 (c) of the Ham licence always gives priority to stations providing emergency communications. In order for Amateur Radio to play an effective role in supporting humanitarian efforts, it is key that all licensees cooperate to minimize potential on-air problems.
ARRL West Central Florida Section Manager Darrell Davis, KT4WX has reported that Amateur Radio Emergency Service (ARES) teams have been requested to provide communication support at evacuation shelters in Highlands, Hillsborough, and Polk counties.
IARU Region 2 Emergency Coordinator Cesar Pio Santos, HR2P, has compiled a list of emergency frequencies, subject to change, for use in the Caribbean to assist communication of Hurricane Irma.
Hurricane Watch Net - 14.325.00 MHz, 7.268.00 MHz
SATERN - 14.265 MHz, 7.262 MHz
Puerto Rico: 3.803, 3.808, 7.188 MHz. Radio amateurs in Puerto Rico also will cooperate with the HWN on 7.268 and 14.325 MHz.
Cuba: Daylight hours, 7.110 MHz (primary) and 7.120 MHz (secondary); Provincial Net — 7.045, 7.080 MHz, and on other lower frequencies as necessary. Nighttime, 3.740 MHz (primary) and 3.720 MHz (secondary) and on other lower frequencies as necessary.
Dominican Republic: 3.873 MHz (primary), 3.815 MHz (secondary), 7.182 MHz (primary), 7.255 MHz (secondary); 14.330 MHz (primary), 21.360 MHz (primary), 28.330 MHz (primary).
Caribbean Emergency and Weather Net (CEWN): 3.815 MHz and 7.162 MHz (when necessary)
ARRL IRMA - http://www.arrl.org/irma