Hello all.

I am new to this forum. I've been reading the posts for a ehile, and decided to go ahead and post my question. I am hoping to get some help from some of the experts whose messages I have been reaing recently.

I used the program from Dave Coffin for the HP-33s for distance and bearing calculation. Now, I have just bought a 35s, and have found that the polar to rectangular conversion just doesnt work the same way. Unfortunately, I am just an airline pilot, and am no computer or math expert.

I was hoping that someone could help me modify this program to make it work in the HP-35s, since replacing the critical lines (D08, D13, D16, D20, D25) by the routines I read about yesterday in this site dont make it work.

Here's the Dave Coffin program:

D01 LBL D

D02 DEG

D03 INPUT N

D04 STO X

D05 INPUT E

D06 INPUT N

D07 1

D08 (polar to rectangular)

D09 INPUT E

D10 R up

D11 -

D12 x<>y

D13 (polar to rectangular)

D14 R up

D15 x<>y

D16 (rectangular to polar)

D17 x<>y

D18 RCL- X

D19 x<>y

D20 (polar to rectangular)

D21 180

D22 Rdown

D23 Rdown

D24 +/-

D25 (rectangular to polar)

D26 Rdown

D27 -

D28 x<>y

D29 ACOS

D30 60

D31 ×

D32 RTN

You enter initial Latitude and Longitude and Final Latitude and Longitude, and it returns the distance in nautical miles and true departure course to fly the great circle trajectory.

I hope I am not bothering the audience with my ignorance about HP calculators.

Thanks in advance for any help.

Rafael.

Edited for grammar.

*Edited: 15 Sept 2007, 2:39 p.m. *