Fix ATM-vs-bar confusion

SAC should be calculated in relationship to surface pressure, not "1 bar".

I also realize that we have a few other cases where we do the same
mistake: the partial pressure calculations do things like

    po2 = o2 / 1000.0 * depth_to_mbar(sample->depth.mm, dive);

which is wrong as well - the partial pressure is also relative to
standard atmospheric pressures.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/profile.c b/profile.c
index 14b76f70e..07328580f 100644
--- a/profile.c
+++ b/profile.c
@@ -226,7 +226,7 @@ static int get_local_sac(struct plot_data *entry1, struct plot_data *entry2, str
 
 	/* Mean pressure in ATM */
 	depth = (entry1->depth + entry2->depth) / 2;
-	atm = (double) depth_to_mbar(depth, dive) / SURFACE_PRESSURE;
+	atm = depth_to_atm(depth, dive);
 
 	cyl = dive->cylinder + index;