
Page 9
GX6000
West Coast
Sea Tow Newport/LA - Ch. 27
Sea Tow San Diego - Ch. 27
Northeast
Sea Tow Portland-Midcoast (Maine) - Ch. 27
Sea Tow Boston - Ch. 27
Sea Tow South Shore (Mass.) - Ch. 28
Sea Tow Rhode Island - Ch. 24
Sea Tow Eastern Long Island - Ch. 27
Sea Tow Huntington (N.Y.) - Ch. 27
Sea Tow Manasquan (N.J.) - Ch. 28
Mid-Atlantic
Sea Tow Northern Chesapeake (Md.) - Ch. 28
Sea Tow Central Chesapeake (Md.) - Ch. 27
Sea Tow Hampton Roads (Va.) - Ch. 28
North Carolina
Sea Tow Wrightsville Beach - Ch. 28
Sea Tow Ocean Isle Beach - Ch. 28
Florida
Sea Tow Sebastian - Ch. 28
Sea Tow Fort Lauderdale - Ch. 27
Sea Tow Charlotte Harbor - Ch. 24
Sea Tow Tampa Bay - Ch. 27
Sea Tow Horseshoe Beach - Ch. 27
Sea Tow Carrabelle/St. Marks - Ch. 27
Sea Tow Pensacola/Orange Beach (Ala.) - Ch. 27
5.10 WHAT IS THE RANGE FOR AIS RECEIVERS?
Since AIS uses similar frequencies as a marine VHF radio, it has similar radio
reception capabilities - which are basically line of sight. This means that the
higher the VHF antenna is mounted, the greater the reception area will be.
Reception from Class A vessels that are 20 or even 30 miles away on open
water is not uncommon as their antennas are mounted high off the water. Class
B transponders use lower power for transmissions; therefore, you can expect
Class B vessels to be acquired when they are 5 to 10 miles away.
NOTE
The GX6000 require two separate marine VHF antennas; one antenna
for VHF and a second antenna for AIS.
For additional information on AIS visit the USCG website:
<http://www.navcen.uscg.gov/marcomms/ais.htm>
5.11 Accuracy of COG*
The error in the COG (the path of the antenna position over ground) due to the
actual ship’s speed over ground shall not exceed the following values:
Speed range (knots)
Accuracy of COG output to user
0 to ≤1 knot
Unreliable or not available
>1 to ≤17 knots
±3°
>17 knots
±1°
* Only when the SCU-31 external GPS antenna connected.