Join Date: Aug 2006
Location: Arlington, VA
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A Few Clarifications
Guys and gals...
A couple of clarifications....
1. While it is true that anyone may LISTEN on any frequency (except cellular phone channels), it is NOT TRUE that you may transmit in one service (e.g., ham) and carry on two-way conversations with someone in another service (e.g., the marine service), except in a bonafide emergency or specially-designated events....like military stations which communicate with ham stations on special event days. The reference for this rule is in Part 97.111 of the FCC rules.
SO, OK to LISTEN, NOT OK to transmit in cross-service mode.
2. The term "SSB" is often misused by non-hams. SSB refers to "single-sideband". This is a form of emission (actually, a form of AM emission), and is NOT particular to the marine service, the amateur service, the aircraft service, or any other service. In fact, with the exception of the aircraft service, most HF transmissions these days are in SSB. Hams use SSB on the ham bands, just as do mariners using SSB on the marine bands.
3. USB vs. LSB operation. USB is a form of SSB, referring to the UPPER SIDEBAND. USB is used in all marine SSB transmissions.
LSB refers to the LOWER SIDEBAND. It is used by hams on the lower bands (40, 75, 160, etc.), and by some other services as desired. It is NOT used by boats in the marine service.