Planning 1 DPM09 v1.1 Copyright © BSAC 2009 Dive Planning and Management Dive Planning

Dive Planning and Management Planning 2 DPM09 v1.1 Copyright © BSAC 2009 Planning Aims Planning role of Dive Manager Why? - the dive objectives Who? - the divers involved Where? - the site and suitability When? - date and time What? - else is required

Dive Planning and Management Planning 3 DPM09 v1.1 Copyright © BSAC 2009 The Role of the Dive Manager Experienced ●Dive Leader - known dive sites Responsible role ●Appointed by the Diving Officer ●Able to delegate ○Assistant Dive Manager ○Other support roles Rescue and surface support Equipment ●For the dive

Dive Planning and Management Planning 4 DPM09 v1.1 Copyright © BSAC 2009 Dive Objectives & the Divers Type of Dive? ●Just diving ●Training ●Combination of both How many divers? ●Boat space available ●Minimum diver grade level ●Grade and experience level? ●Buddy pairings ○Training ○General diving ○Special interests ○Nitrox/Rebreathers

Dive Planning and Management Planning 5 DPM09 v1.1 Copyright © BSAC 2009 The Dive Site – Known to the Branch Site characteristics ●Boat or shore dives ●Variation in depth ●General conditions underwater ○Visibility ○Areas of interest ●Facilities ○Access - parking ○Cylinder charging facilities ○Changing & toilet facilities ○Refreshments ○Accommodation ●How to get there?

Dive Planning and Management Planning 6 DPM09 v1.1 Copyright © BSAC 2009 Site Information & Location Sources of information ●Charts - maps of the sea ●Tide Tables Weather information If boat diving ●GPS ●Echo Sounder ●Transits

Dive Planning and Management Planning 7 DPM09 v1.1 Copyright © BSAC 2009 Gas Planning for depth Emergency gas consumption Rates ●Dives below 35m and deeper Deco dives ●End of dive until first stop ●Emergency/Stress under water ●Accelerated breathing Rates ●Often > 25l/min ●Example: Consumption rates for an out of gas situation, buddy pair ascending using one aqualung system. ○Breathing rates at onset of incident and during emergency – 50l/min stressed diver ○25l/min – buddy/rescuer

Dive Planning and Management Planning 8 DPM09 v1.1 Copyright © BSAC 2009 Gas Planning for Depth Ascent from 35 metres to 1st 10m/min = 3 min Extra time for sharing and settling down = 1 min Absolute pressure = 4.5 bar Combined breathing rate = = 75 litre/min Gas required = (breathing rate) x (pressure) x (time) = 75 x 4.5 x 4 = 1350 litres A fully charged 232 bar, 12l cylinder holds 2780 litres

Dive Planning and Management Planning 9 DPM09 v1.1 Copyright © BSAC 2009 Summary Planning The Role of the Dive Manager Dive Objectives & the Divers The Dive Site - Known to Branch Site Information & Location Gas Planning for Depth