Offshore central stations may be used as repeater stations provided that the licensee is able to maintain control of the station, and in particular, to turn the transmitter off, regardless of whether associated subscriber stations are transmitting at the time.

Table I-2—Maximum ERP (Watts)

Distance from the 4.8 km (3 mi) limit30 meters (100 feet)61 meters (200 feet)
6.4 km (4 mi)256
8.0 km (5 mi)4010
9.7 km (6 mi)6515
11.3 km (7 mi)10025
12.9 km (8 mi)15035
14.5 km (9 mi)21550
16.1 km (10 mi)29570
17.7 km (11 mi)400100
19.3 km (12 mi)530130
20.9 km (13 mi)685170
22.5 km (14 mi)870215
24.1 km (15 mi)1000270
25.7 km (16 mi)1000415
27.4 km (17 mi)1000505
29.0 km (18 mi)1000610
30.6 km (19 mi)1000730
32.2 km (20 mi)1000865
33.8 km (21 mi)10001000