§  22.1013   Effective radiated power limitations.

   The effective radiated power (ERP) of transmitters in the Offshore
   Radiotelephone Service must not exceed the limits in this section.

   (a) Maximum power. The ERP of transmitters in this service must not
   exceed 1000 Watts under any circumstances.

   (b) Mobile transmitters. The ERP of mobile transmitters must not exceed
   100 Watts. The ERP of mobile transmitters, when located within 32
   kilometers (20 miles) of the 4.8 kilometer (3 mile) limit, must not
   exceed 25 Watts. The ERP of airborne mobile stations must not exceed 1
   Watt.

   (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.

   (1) Co-channel protection. The ERP of offshore stations must not exceed
   the limits in Table I-1 of this section. The limits depend upon the
   height above mean sea level of the offshore transmitting antenna and
   the distance between the antenna location of the offshore transmitter
   and the antenna location of the main transmitter of the nearest
   full-service television station that transmits on the TV channel
   containing the channel on which the offshore station transmits.

   (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.

   Table I-1—Maximum ERP (Watts)
     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

   return arrow Back to Top