Guidelines for depth sounder use on a typical u-boat:
Code:
Water depth Sounding Interval
< 10m Monitor continously
10m - < 100m Every 15 minutes
100m - < 300m Every 30 minutes
> 300m Every hour
Suggestion:
A new tool where we can choose the interval in minutes at what interval
the depth soundings is called out.
Expl:
We are 20sm east of Bornholm, near to the coast,
with a water depth of 60 metres. Then we manually change the intervall for depth soundings to every 15 minutes. etc...