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Annotation of researchv10dc/man/mana/av.7, revision 1.1.1.1

1.1       root        1: .TH DIST 7 purdy
                      2: .CT 1 inst_info
                      3: .SH NAME
                      4: dist, dme, plan, path, cross \(mi aviation navigation
                      5: .SH SYNOPSIS
                      6: .B /usr/ken/bin/dist
                      7: .I obj obj ...
                      8: .PP
                      9: .B /usr/ken/bin/dme
                     10: .I obj radial dist
                     11: .PP
                     12: .B /usr/ken/bin/plan
                     13: [
                     14: .BI - dist1
                     15: [
                     16: .BI - dist2
                     17: ]]
                     18: .I obj obj
                     19: .PP
                     20: .B /usr/ken/bin/path
                     21: [
                     22: .BI - dist
                     23: ]
                     24: .I obj obj ...
                     25: .PP
                     26: .B /usr/ken/bin/cross
                     27: [
                     28: .BI - dist
                     29: ]
                     30: .I obj
                     31: .SH DESCRIPTION
                     32: These routines provide navigation services
                     33: using an aviation database.
                     34: .I Objects
                     35: in the database are of four types:
                     36: VORs ending in 
                     37: .BR .v ,
                     38: airports ending in 
                     39: .BR .a ,
                     40: NDBs ending in 
                     41: .BR .n ,
                     42: and intersections ending in 
                     43: .BR .i .
                     44: An ambiguous object specified without
                     45: suffix is interpreted in the above order.
                     46: .PP
                     47: The canonical program in this series,
                     48: .IR dist ,
                     49: prints the magnetic bearing and distance in
                     50: nautical miles between a set of two or more specified objects.
                     51: The magnetic correction is applied at the first of a pair
                     52: of objects,
                     53: so the bearing from Morristown to San Diego is
                     54: 281 degrees while the reverse is 50 degrees.
                     55: .I Dist
                     56: also prints a frequency for objects.
                     57: For VORs and NDBs,
                     58: the frequency is obvious.
                     59: For airports,
                     60: the frequency is sometimes the tower frequency,
                     61: sometimes UNICOM and sometimes zero.
                     62: Intersections have no frequency.
                     63: .PP
                     64: .I Dme
                     65: prints the latitude and longitude
                     66: of a point that is a bearing and distance from an object.
                     67: The format printed is the source form of the database of objects.
                     68: .I Dme
                     69: is used to create new objects for the database \(mi usually intersections.
                     70: .PP
                     71: .I Plan
                     72: finds a shortest distance from one object to another traveling
                     73: along a route of VORs.
                     74: The optional argument
                     75: .I dist1
                     76: is the maximum allowable distance between VORs
                     77: en route (default 100 nautical miles) and
                     78: .I dist2
                     79: is the maximum allowable distance between the starting
                     80: object and the first VOR and the last VOR and terminal object
                     81: (default 50).
                     82: .PP
                     83: .I Path
                     84: lists all objects in the database that lie
                     85: within
                     86: .I dist
                     87: (default 10 nautical miles)
                     88: of the great circle route between two objects.
                     89: If more than two arguments are given,
                     90: routes are calculated for each pair of objects.
                     91: The list is ordered by distance along the route.
                     92: The tangential distance to each object is given
                     93: with negative to the left and positive to the right.
                     94: .PP
                     95: .I Cross
                     96: prints all objects in the database
                     97: within
                     98: .I dist
                     99: (default 50 nautical miles)
                    100: from the given object.
                    101: .SH FILES
                    102: .TP /usr/ken/lib/obj
                    103: objects
                    104: .SH SEE ALSO
                    105: .IR avw (7)
                    106: .SH BUGS
                    107: The database is old and should not be used for navigation purposes.
                    108: .br
                    109: Frequencies for airports are inconsistent.
                    110: .br
                    111: .I Plan
                    112: uses low power (terminal) VORs when very often these
                    113: cannot be tracked from 50 miles.
                    114: .br
                    115: .I Plan
                    116: will cheerfully plan routes through prohibited areas,
                    117: over open water and over high mountains.
                    118: The only criterion is the distance between objects.
                    119: .br
                    120: .I Cross
                    121: has bugs.

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