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