The Museum of HP Calculators

Star Line of Position for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HP-67 Navigation Pac 1. This program was ported to the HP-41C by reading with the HP-41C card reader and the card reader may be required for operation of this program. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

This program calculates your "line of position" based on sighting a start with a Sextant. Load one of the Star Data Programs (1 - 6) before running this program.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "STLP67"
 02 LBL 10
 03 LBL A
 04 STO 06
 05 X<>Y
 06 STO 04
 07 3056
 08 %
 09 INT
 10 ST+ 06
 11 R^
 12 STO 05
 13 RCL 04
 14 3
 15 X>Y?
 16 1
 17 RCL 05
 18 4
 19 /
 20 FRC
 21 +
 22 1
 23 X<>Y
 24 X=Y?
 25 2
 26 ST- 06
 27 1969.1
 28 ST- 05
 29 RCL 06
 30 365.25
 31 STO 20
 32 /
 33 ST+ 05
 34 360
 35 STO 22
 36 ST* 06
 37 25986
 38 ST+ 06
 39 RCL 20
 40 ST/ 06
 41 19
 42 XEQ 02
 43 RCL 24
 44 -
 45 .8
 46 P-R
 47 STO 00
 48 RDN
 49 STO 04
 50 RCL 24
 51 2
 52 XEQ 02
 53 P-R
 54 ST+ 04
 55 RDN
 56 RCL 23
 57 TAN
 58 ST* 00
 59 *
 60 93
 61 RCL 24
 62 XEQ 01
 63 -
 64 ST+ 00
 65 RCL 06
 66 RCL 24
 67 +
 68 2
 69 P-R
 70 RCL 23
 71 1
 72 P-R
 73 X<>Y
 74 R^
 75 *
 76 ST+ 04
 77 RDN
 78 /
 79 ST- 00
 80 RCL 06
 81 LASTX
 82 P-R
 83 .8
 84 *
 85 ST+ 04
 86 0
 87 RCL 23
 88 XEQ 01
 89 ST+ 04
 90 RCL 22
 91 ST/ 00
 92 ST/ 04
 93 RCL 23
 94 ST+ 04
 95 RCL 24
 96 ST+ 00
 97 RCL 22
 98 RTN
 99 LBL 15
100 LBL a
101 HR
102 STO 01
103 X<>Y
104 HR
105 STO 03
106 RTN
107 LBL 11
108 LBL B
109 HR
110 15.04107
111 *
112 RCL 06
113 +
114 RCL 00
115 +
116 STO 02
117 RCL 01
118 -
119 RCL 04
120 COS
121 P-R
122 RCL 03
123 STO 25
124 X<>Y
125 P-R
126 X<> 25
127 RCL 04
128 SIN
129 P-R
130 X<> 25
131 +
132 ASIN
133 X<> 25
134 -
135 R-P
136 RDN
137 180
138 +
139 STO 07
140 7DSP1
141 7PRTX
142 RCL 25
143 STO 08
144 HMS
145 7DSP4
146 7PRTX
147 RTN
148 LBL 12
149 LBL C
150 7DSP1
151 HR
152 ENTER
153 ENTER
154 ENTER
155 3
156 +
157 12
158 *
159 ATAN
160 -
161 TAN
162 RCL 21
163 SQRT
164 -
165 62
166 /
167 +
168 RCL 08
169 -
170 CHS
171 60
172 *
173 STO 09
174 RTN
175 LBL 01
176 RCL 22
177 /
178 INT
179 -
180 50
181 /
182 LBL 02
183 RCL 05
184 *
185 RTN
186 LBL 16
187 LBL b
188 STO 21
189 RTN
190 STOP
191 END

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