47 C.F.R. § 22.1013
The effective radiated power (ERP) of transmitters in the Offshore Radiotelephone Service must not exceed the limits in this section.
(c) Protection for TV Reception. The ERP limitations in this paragraph are intended to reduce the likelihood that interference to television reception from offshore radiotelephone operations will occur.
(2) Adjacent channel protection. The ERP of offshore stations located within 128.8 kilometers (80 miles) of the main transmitter antenna of a full service TV station that transmits on a TV channel adjacent to the TV channel which contains the channel on which the offshore station transmits must not exceed the limits in the Table I-2 of § 22.1015. The limits depend upon the height above mean sea level of the offshore transmitting antenna and the distance between the location of the offshore transmitter and the 4.8 kilometer (3 mile) limit.
| Distance | 30 meters (100 feet) | 45 meters (150 feet) | 61 meters (200 feet) |
|---|---|---|---|
| 338 km (210 mi) | 1000 | 1000 | 1000 |
| 330 km (205 mi) | 1000 | 900 | 800 |
| 2 km (200 mi) | 800 | 710 | 630 |
| 314 km (195 mi) | 590 | 520 | 450 |
| 306 km (190 mi) | 450 | 400 | 330 |
| 298 km (185 mi) | 320 | 280 | 240 |
| 290 km (180 mi) | 250 | 210 | 175 |
| 282 km (175 mi) | 180 | 150 | 130 |
| 274 km (170 mi) | 175 | 110 | 100 |
| 266 km (165 mi) | 95 | 80 | 70 |
| 258 km (160 mi) | 65 | 55 | 50 |
| 249 km (155 mi) | 50 | 40 | 35 |
| 241 km (150 mi) | 35 | 30 | 25 |