HP-71B Software for navigation

[Erwin]

(08-11-2019 04:05 PM)rprosperi Wrote:  Congratulations, both on surviving your initial trip using 'old school' navigation equipment, and also for proven success in re-establishing a working navigation system on your 71B!

Was the final program you used from the Schenk book, from the translated 41 ROM (using the 41 emulator) or some hybrid you created? Hopefully, once enhanced as you suggest above, you'll be willing to post and share your programs - you never know, there could be other brave souls wanting to use pre-GPS navigation too.

Well done Erwin, thanks for sharing your planning and success stories here.

Hi Bob,

thanks ... my actual program is this from post program it is my basic program based on the Excel from Andy. It is not optimized code, cause it is about 25 years ago I programmed in Basic. The 41 emulator I'll give another try in autumn, cause I have to dig in the "art of programing". Would be fine to find a possibility to start the input for the HP41 program from basic, so I have a common interface. But priority is develop my Basic program.
Of course I''ll share my program again if it is advanced.

Edit Why I concentrate on sun navigation? Cause it is the most Bobby Schenk used on his trips.
Bobby Schenk calculates in a similar way like in my bass program with the necessary tables. So it is more or less the same method. I had as a backup the ephemerides data (Alamanc) for the sailing trip with me (see attachment).

EDIT 2 There are 2 other different books which, in my opinion are essential to understand navigation.

• The calculator aflot (it is manly the theory and examples)
• Calculator navigation (theory, examples and HP67 programs)
  

What I'm not able to do is, the HP67 programs convert into HP71 Basic - that would be the ultimate program :-)

best regards
Erwin