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The X-Philes (2nd Revision)
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The X-Philes Number 1 (1995).iso
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celdrnav.doc
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1995-03-31
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(comp.sources.hp48)
Author: [Robert Irving]
Subj: CELESTIAL & DR NAVIGATION
Version: 3-3 Rev A **
Checksum: # 4BC9h
Bytes: 8775.5 (8778.5 for CELDRNAV.SRC)
Date: 24 Jan 1993
Keywords: Celestial, Navigation, Dead-reckoning, Position
Telephone: (818) 767 9740
** This revision corrects a logical statement error in Program
STRN. STRN corrected checksum is # 130h and bytecount is 2323.
All other programs were correct as transmitted.
These programs are SHAREWARE. Copyright (C) 1993 by Robert
Irving. See end of document for conditions on use.
I suggest that the DIR name 'CELDRNAV' be changed to 'NAV'
before transfer to the HP48. Bytecount will be 8770.5.
PROGRAMS
CNT A single-key CONTinue.
# 5762h 12.5
CONV Converts input in DDD.MMM (degrees.minutes
# AC27h 53.5 &tenths) to DDD.DDD (decimal degrees)
DRT Dead-reckoning track from a non-celestial fix.
#ADD6h 553.5
NTIM/NTMN Times of sight determined by pushbutton, and
# 1631h 237 body sextant altitudes entered by operator.
# 97B4h 237 Entry of "999" calls sight reduction program.
RESET Dead-reckoning track from a celestial fix.
# F28Bh 176
DRDIS Display of last DR position (GCT, Lat, Long).
# 7044h 272.5
RANG Redisplay of prior fix plot, display centered
# 928Dh 133 at fix position, plot magnified by 3.2.
LZT Display local zone time (HHMM.) and indicate
# 5422h 399.5 difference in local date from Greenwich date.
These principal programs are supported by subprograms:
LEGS # 8EC8h 665.5
STRED # 234Eh 542.5
STAR # 6E00h 1430
RNFX # F44Eh 224.5
SNTR # 8DABh 320
POSPLOT # 22CAh 341.5
STRDN # C290h 542.5
STRN # 130h 2323
OBJECTS
CST1 List for Custom Menu used with Air Almanac
CST2 List for Custom Menu used with Nautical Almanac.
GMTZ Number describing the Local Zone Time (LZT).
This number is zero at Greenwich, increasing
by one for each 15 degrees West and decreasing
by one for each 15 degrees East in position.
Enter #(LZT) 'GMTZ' STO before running programs.
OPERATION
All principal programs prompt in detail for the necessary input.
Programs NTIM, STRED, and STAR work with the Air Almanac, show-
ing appropriate prompts for the ephemeris inputs needed.
Programs NTMN, STRDN, and STRN work similarly with the Nautical
Almanac. Unused programs and associated list can be PURGED. All
programs provide a precision of better than 0.1'. These programs
were prepared primarily for the operator of a small ship (sailboat
or powered yacht, with magnetic compass) not routinely using
celestial navigation. Using these programs, one can take a
round of sextant sights, and enter the necessary ephemeris
data, without overlooking any necessary input. Most voyages
begin with Program DRT, since it accepts inputs from navigation
fixes other than celestial. Program RESET continues DR tracking
after a celestial fix, to the next (celestial or non-celestial) fix.
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.
USE OF THESE PROGRAMS WITHOUT THE ASSOCIATED HANDBOOK IS VERY
LIKELY TO LEAD TO SERIOUS ERROR.
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 navigation 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 objective 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 to
register your name with the programs.
If these programs are useful to you, please send a payment of
$18.00 (US funds) to: Robert Irving, 9234 Cayuga Avenue,
Sun Valley, CA 91352-1303. Telephone: (818) 767 9740.
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.
- - - - - - - - - - - - - CUT HERE - - - - - - - - - - - - - -
TO: ROBERT IRVING
9234 CAYUGA AVENUE
SUN VALLEY, CA 91352-1303
SUBJ: REGISTRATION FOR CELDRNAV PROGRAMS 3-3
1. I ENCLOSE PAYMENT IN THE AMOUNT OF $18.00 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:_____________________