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-rw-r--r--core/profile.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/core/profile.c b/core/profile.c
index e96febffb..d62caab93 100644
--- a/core/profile.c
+++ b/core/profile.c
@@ -1028,9 +1028,11 @@ void calculate_deco_information(struct dive *dive, struct divecomputer *dc, stru
if (first_iteration) {
nuclear_regeneration(t1);
vpmb_start_gradient();
- /* For CVA calculations, start by guessing deco time = dive time remaining */
+ /* For CVA calculations, deco time = dive time remaining is a good guess,
+ but we want to over-estimate deco_time for the first iteration so it
+ converges correctly, so add 30min*/
if (!in_planner())
- deco_time = pi->maxtime - t1;
+ deco_time = pi->maxtime - t1 + 1800;
vpmb_next_gradient(deco_time, surface_pressure / 1000.0);
}
}