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The X-Philes (2nd Revision)
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The X-Philes Number 1 (1995).iso
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gcirnav.doc
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1995-03-31
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117 lines
(comp.sources.hp48)
Author: [Robert Irving]
Subj: GREAT CIRCLE NAVIGATION
Version: 1-2
Checksum: # 3962h
Bytes: 8716.5
Date: 15 Nov 1992
Keywords: Great circle, Rhumbline, Vertex, Position
These programs are SHAREWARE. Copyright (C) 1992 by Robert
Irving. See end of document for conditions on use.
I suggest that the DIR name 'GCIRNAV' be changed to 'GCIR'
before transfer to the HP48. Bytes will be 8713.5.
PROGRAMS
CNT One-key CONTinue command.
CONV Converts input in DDD.MMT (degrees.minutes
&tenths) to DDD.DDD (decimal degrees).
GCST Prompts for endpoints of great circle (gc) path.
VRTX Calculates vertices of gc.
BRG Calculates initial bearing of gc.
INCRE Prompts for type (DIST or LONG) of increments.
LNGI Prompts for magnitude of LONG increment.
DISTI Prompts for magnitude of DIST increment.
GCPR Initiated waypoint calculations.
LNGC Calculates waypoints for LONG increments.
DISTC Calculates waypoints for DIST increments.
RHMB Calculates course & distance for legs.
OBJECT
CST1 List used for Custom Menu.
OPERATION
These programs prompt for all necessary inputs. Input of
endpoints is in format DDD.MMM (degrees.minutes&tenths).
Size & number of legs may be determined either by length
(DIST) or span of longitude (LONG) between waypoints.
Output of waypoints is in format DDD.MM. Initial bearing of
gc and course for each leg are in format DDD.D. Distances
are in nautical miles (NM) in format NNNN.NN. All programs
provide a precision of better than 0.1'. If a vertex of the
gc is on the path traveled, provision is made for a "composite"
(latitude limited) path, for example, to avoid icepacks or the
Antarctic continent.
NOTICE
The author has exercised due diligence in the preparation of
these calculator programs. The author has, in the handbook
available for purchase (See SHAREWARE below) made adequate
explanations, including provision of instructions and
CAUTIONs for proper use and WARNINGs as to the potential
results of misuse. The author reserves the right to make
improvements in these programs at any time, and without notice.
EACH ENDPOINT AND WAYPOINT MUST BE TRANSFERRED TO A STANDARD
NAVIGATIONAL CHART AND EACH RHUMBLINE (LEG) MUST BE DRAWN IN
TO ENSURE THAT THERE ARE NO OBSTRUCTIONS ON THE PATH. FAILURE
TO DO SO MAY HAZARD THE VESSEL.
The author makes no warranties, either express or implied, with
respect to the software described herein, its quality,
performance, merchantability or fitness for any particular
purpose. These programs are provided "as is". The author shall
not be liable for errors contained herein, nor for direct,
indirect, incidental or consequential damages in connection with
the performance or use of the software described herein.
The author has no business or financial relationship with
HEWLETT PACKARD.
SHAREWARE
These calculator programs are a SHAREWARE product protected by
Copyright. They are neither Public Domain nor FREE software.
You may use these programs to determine if they are suitable for
your purposes, and you may make copies to give to others for the
same objectives provided the copies include ALL the original
material including this document. The author does not receive
any fee from bulletin boards or other methods of distribution.
The author is paid only when you make a direct payment in order
to register.
If these programs are useful to you, please send a payment of
$15.00 (US funds) to: Robert Irving, 9234 Cayuga Avenue,
Sun Valley, CA 91352-1303.
In return for your registration, you will receive the handbook,
including detailed instructions, CAUTIONs, and WARNINGs; an
annotated source code; and a sample solution. In addition, you
will be notified when revisions of the programs or the handbook
are produced, and advised of any similar new products developed.
NOTE: An equivalent program is available for the IBM PC in
GW-BASIC or QBASIC on 3\" or 5^" DD or HD disk (specify BASIC &
disk size/density) at $20.00 US.
- - - - - - - - - - - - - CUT HERE - - - - - - - - - - - - - -
TO: ROBERT IRVING
9234 CAYUGA AVENUE
SUN VALLEY, CA 91352-1303
SUBJ: REGISTRATION FOR GCIRNAV PROGRAMS 1-2
1. I ENCLOSE PAYMENT IN THE AMOUNT OF $15.00 US FUNDS.
ADD MY NAME TO THE LIST OF REGISTERED USERS, AND SEND ME
A COPY OF THE CURRENT HANDBOOK FOR SUBJECT PROGRAMS.
NAME: __________________________
STREET/APT:______________________
CITY/ST/ZIP:_____________________