baum@apple.com (Allen Baum) (08/16/89)
From: baum@apple.com (Allen Baum) >In article <26710@amdcad.AMD.COM> willey@arrakis.nevada.edu (James P. Willey) writes: >3. Like the artillery, the FOO is easy to locate. (location of artillery has >already been discussed, so I will not go into that here) Thus, if the FOO >is to survive, he must move if his position might have been compromised. >(like using his radio to call for fire support) During these moves, he will >be out of contact. Why is it easy to find the FOO? With the advent of satellite transponders, and something to compress and squirt a transmission, I would think it would be very hard to locate a transmitter. I thought it wasn't very easy to begin with- a lot of hunting and turning antennas, etc. -- baum@apple.com (408)974-3385 {decwrl,hplabs}!amdahl!apple!baum
smb@ulysses.homer.nj.att.com (Steven M. Bellovin) (08/18/89)
From: smb@ulysses.homer.nj.att.com (Steven M. Bellovin) In article <26781@amdcad.AMD.COM>, baum@apple.com (Allen Baum) writes: > Why is it easy to find the FOO? With the advent of satellite transponders, > and something to compress and squirt a transmission, I would think it would be > very hard to locate a transmitter. I thought it wasn't very easy to begin > with- a lot of hunting and turning antennas, etc. I suspect that a lot depends on how directional the transmission is, and just how good the compression is; however, Kahn reports an incident during World War II, wherein 26 direction-finding stations located a 15-second (compressed) U-boat transmission. (P. 504 in my hard-cover copy.) Use of spread-spectrum techniques might alter that equation a lot, though. --Steve Bellovin
willey@arrakis.nevada.edu (James P. Willey) (08/21/89)
From: willey@arrakis.nevada.edu (James P. Willey) In article <26781@amdcad.AMD.COM> baum@apple.com (Allen Baum) writes: > >Why is it easy to find the FOO? With the advent of satellite transponders, >and something to compress and squirt a transmission, I would think it would be >very hard to locate a transmitter. I thought it wasn't very easy to begin >with- a lot of hunting and turning antennas, etc. Any attacking force will have his DF ears wide open to locate any artillery observers. Communications is not one of my strong points, but I do know that any observer who relies on the satellites being there could very possibly be disappointed. My previous message was a summary of some of the lessons in First Clash. Maybe someone out in net.land who knows about communications can clear up this point. Basically, can the techno-gizmos referred to by Allen operate without the satellites, and what back-up communications equipment are standard? -- James P. Willey willey@arrakis.NEVADA.EDU Disclainer: I'm unemployed, so my employer IS responsible for my opinions. A WWI biplane had perhaps fifteen guages and instruments, a WWII fighter some thirty-five or so. By the time of the Global Civil War, a front-line fighter-bomber had approximately four hundred indicators, readouts, and so forth. Robotech mecha made those planes look as simple as unicycles. (Robotech)
nagle@lll-crg.llnl.gov (John Nagle) (08/21/89)
From: well!nagle@lll-crg.llnl.gov (John Nagle) In article <26781@amdcad.AMD.COM> baum@apple.com (Allen Baum) writes: > >Why is it easy to find the FOO? With the advent of satellite transponders, >and something to compress and squirt a transmission, I would think it would be >very hard to locate a transmitter. The usual low-tech solution is for the FOO to use a wired field phone when possible. Why complicate things? John Nagle
borynec@bnr-di.UUCP (08/21/89)
From: borynec@bnr-di.UUCP In article <26781@amdcad.AMD.COM>, baum@apple.com (Allen Baum) writes: > > Why is it easy to find the FOO? With the advent of satellite transponders, > and something to compress and squirt a transmission, I would think it would be > very hard to locate a transmitter. I thought it wasn't very easy to begin > with- a lot of hunting and turning antennas, etc. Actually, in the defense, you don't even need that sort of high technology. Artillery regiments typically have a line section which gives them the capability to run telephones between the FOO's and their command posts. This allows them to communicate without breaking radio silence. This technology is circa WWI. Cheers ... James Borynec -- UUCP : utzoo!bnr-vpa!bnr-di!borynec James Borynec, Bell Northern Research Bitnet: borynec@bnr.CA Box 3511, Stn C, Ottawa, Ontario K1Y 4H7