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## The Recreational Dive Planner

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**The Recreational Dive Planner**Instructions for Use Jane E. Spencer MSDT 45434**Sample Problems - Table 1**• A dive to 43 feet for one hour yields what pressure group? 43’ :60**Sample Problems - Table 1**• A dive to 43 feet for one hour yields what pressure group? S 43’ :60**Sample Problems - Table 1**• A dive to 28 feet for 70 minutes yields what pressure group? 28’ :70**Sample Problems - Table 1**• A dive to 28 feet for 70 minutes yields what pressure group? N 28’ :70**Sample Problems - Table 1**• A dive to 60 feet for 40 minutes yields what pressure group? 60’ :40**Sample Problems - Table 1**• A dive to 60 feet for 40 minutes yields what pressure group? Q 60’ :40**Sample Problems - Table 2**• After a dive you are in pressure group J. What will your new pressure group be after a 32 minute surface interval? :32 J**Sample Problems - Table 2**• After a dive you are in pressure group J. What will your new pressure group be after a 32 minute surface interval? :32 J E**Sample Problems - Table 2**• A diver in pressure group P will be in what pressure group after a 55 minute surface interval? :55 P**Sample Problems - Table 2**• A diver in pressure group P will be in what pressure group after a 55 minute surface interval? :55 P F**Sample Problems - Table 2**• A diver in pressure group I will be in what pressure group after a surface interval of four hours? 4:00 P**Sample Problems - Table 2**• A diver in pressure group I will be in what pressure group after a surface interval of four hours? 4:00 P A**Sample Problems - Table 3**• If you are in pressure group K after your surface interval, and you are planning a dive to 60 feet, what is your adjusted no decompression limit? K 60’**Sample Problems - Table 3**• If you are in pressure group K after your surface interval, and you are planning a dive to 60 feet, what is your adjusted no decompression limit? K 60’ 29 ANDL = 26 26**Sample Problems - Table 3**• After a surface interval you are in pressure group P and planning a dive to 50 feet. What is your adjusted no decompression limit? P 50’**Sample Problems - Table 3**• After a surface interval you are in pressure group P and planning a dive to 50 feet. What is your adjusted no decompression limit? P 50’ 50 ANDL = 30 30**Sample Problems - Table 3**• If you’re in pressure group M after a surface interval, what is the residual nitrogen time if you’re planning a repetitive dive to 60 feet? M 60’**Sample Problems - Table 3**• If you’re in pressure group M after a surface interval, what is the residual nitrogen time if you’re planning a repetitive dive to 60 feet? M 60’ 33 RNT = 33 22**Sample Problems - Table 3**• Following a surface interval, you’re in pressure group T. What would be your RNT for a repetitive dive to 50 feet? T 50’**Sample Problems - Table 3**• Following a surface interval, you’re in pressure group T. What would be your RNT for a repetitive dive to 50 feet? T 50’ 63 RNT = 63 17**Drawing the Dive Profile**• Avoid confusion and make sure you don’t miss steps. Surface Interval between dives (hours and minutes) Pressure Group after Surface Interval Pressure Group after Dive 1 Pressure Group after Dive 2 : RNT Depth Depth +ABT TBT Bottom Time Bottom Time Find the RAT! Dive 1 Dive 2**Planning Multiple Repetitive Dives**• Indicate the final pressure group upon surfacing after the following series of dives. 1:00 M D S 40’ 50’ 25 RNT Depth Depth +60 +ABT 40 60 85 TBT**Planning Multiple Repetitive Dives**• Indicate the final pressure group upon surfacing after the following series of dives. :24 50’ 55’ RNT Depth Depth + +ABT 50 30 TBT**Planning Multiple Repetitive Dives**• Indicate the final pressure group upon surfacing after the following series of dives. :24 U O X 50’ 55’ 47 RNT Depth Depth +30 +ABT 50 30 77 TBT**Minimum Surface Interval**• Find the minimum surface interval required to complete the following series of dives. : 60’ 60’ RNT Depth Depth + +ABT 40 40 TBT**Minimum Surface Interval**• Find the minimum surface interval required to complete the following series of dives. Q 1:21 C 60’ 60’ RNT Depth Depth + +ABT 40 40 TBT**Minimum Surface Interval**• Find the minimum surface interval required to complete the following series of dives. : 40’ 50’ RNT Depth Depth + +ABT 60 70 TBT**Minimum Surface Interval**• Find the minimum surface interval required to complete the following series of dives. :11 S P 40’ 50’ RNT Depth Depth + +ABT 60 70 TBT**Special Rules**• Flying after diving – wait 12 hours or for repetitive dives and/or multiple days wait 18 hours (suggested) • Cold – add 10 feet • 1000’ altitude limit for RDP • Safety Stop – always do a safety stop • A Safety Stop is REQUIRED for dives 100’ plus or within three letter groups of NDL, or NDL • Ascend no faster than 60 feet per minute**Emergency Decompression**• If a no decompression limit is exceeded by no more than 5 minutes, an 8 minute decompression stop at 15 feet is mandatory. Upon surfacing the diver must stay out of the water for at least 6 hours. • If a no decompression limit is exceeded by more than 5 minutes a 15 foot decompression stop at 15 feet is urged (air supply permitting). Upon surfacing the diver must remain out of the water for at least 24 hours before making another dive.