Surveying and 400 degree circles.

[matthiaspaul]

I too would like to suggest to support a GRAD mode (full circle = 400 gon) and corresponding conversion functions. To me, it looks really odd for a high-end calculator to not support it. It certainly has its uses outside of surveying and mining as well, not so much to present end results in gon, but just for quick back-and-forth conversion estimations (for the correspondence of a quadrant (∟) or quarter turn with 100 gon and "percent").

In addition to this, I am an advocate of a forth mode named TURN (full circle = 1), otherwise analogous to the DEG, RAD, GRAD modes. In my experience (I implemented it in a software calculator I wrote a long time ago), this can be very handy in practise, and it might be a nice novel feature in HP calculators. (It is also on my ToDo list for the WP 34s.)

Greetings,

Matthias

EDIT: See also:
http://www.hpmuseum.org/forum/thread-475...l#pid42413
http://www.hpmuseum.org/forum/thread-542...l#pid48945