Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-06-09
1985-10-15
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
340539, 455 98, G01S 302
Patent
active
045477787
ABSTRACT:
A method and apparatus for determining the position of a vessel in distress and transmitting an auditory distress message containing the position of the vessel. The apparatus obtains the position of the vessel as determined by a LORAN-C type receiver from either a cassette or directly from the LORAN-C receiver and generates a "Mayday" message including the identification of a vessel, the position of the vessel and the nature of the emergency. The "Mayday" message is synthesized into an auditory human or Morse code message. The language of the auditory message is preferably chosen to correspond with the most likely language used by a possible receiver of the "Mayday" message. Also preferably, the apparatus determines whether the primary distress radio frequency is clear; should the primary distress frequency be in use, the apparatus automatically shifts to a secondary frequency and transmits the "Mayday" message. During transmission on the secondary frequency the apparatus continues to monitor primary frequency; when the primary frequency clears, the "Mayday" message is transmitted thereon.
REFERENCES:
patent: 3711856 (1973-01-01), Adrian et al.
patent: 3793635 (1974-02-01), Potter
patent: 3840877 (1974-10-01), Crane
patent: 3886553 (1975-05-01), Bates
patent: 3907223 (1975-09-01), Crane
patent: 3949399 (1976-04-01), Huber et al.
patent: 4232391 (1980-11-01), Zanutti
patent: 4352199 (1982-09-01), Rogard
Master Specialties Company (MSC), flier on "Expandable Voice Annunciator".
Hinkle Robert W.
O'Hagan Michael
Bandy Alva H.
Blum Theodore M.
Heiting Leo N.
Kaiser K. R.
Sharp Melvin
LandOfFree
Method and apparatus for automatic distress call signal transmis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for automatic distress call signal transmis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for automatic distress call signal transmis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2432003