A dive planned within two days of an earlier one starts with the residual nitrogen, helium and oxygen exposure that dive left behind. Give each plan a date and an entry time and DiveLogic chains them, so the later dive is planned from the loading it really begins with. Its schedule runs longer than the same dive would alone.
What gets chained
Every saved plan that enters the water before this one, and within two days of it, joins the series. They are ordered by entry time, across midnight as readily as within one day: a dive at 14:00 yesterday and one at 08:00 today are eighteen hours apart, and both are in.
A plan with no date or no entry time cannot be placed in the sequence, so it is left out. If it shares a date with the dive you are planning, the planner warns you. That schedule was computed as though the dive never happened, so its residual loading is not accounted for and the decompression is under-stated. Set an entry time on the earlier plan and recompute.
The surface interval
The Surface Interval card opens the Decompression section. It states the time between surfacing from the previous dive and entering the water on this one.
Surface Interval
Time on the surface between Reef wall - morning surfacing and this dive entering the water. It decides how much inert gas and oxygen exposure this dive starts with.
- From dive times: worked out from the entry times on the two plans and how long the first one runs. Extend the first dive’s bottom time and the interval after it shortens by the same amount.
- Set by hand: you enter the interval in hours and minutes. Use it when you know the surface time whatever the entry times say, such as waiting on a tide or a boat move.
A hand-set interval replaces the derived one. Set one longer than the entry times allow and the schedule gets shorter, because the planner credits you with more off-gassing than those times give. The card says so, and so does the plan.
With no earlier dive in range the card carries no control and the dive is planned from full desaturation. There is nothing to set until an earlier plan has a date and an entry time.
Next
- Air breaks is the next card.
- The Review step shows the finished series, with the loading each dive started from.
- Tissue compartments covers what washes out across the interval.