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.

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The recreational dive planner

The Recreational Dive Planner

Instructions for Use

Jane E. Spencer

MSDT 45434


Sample problems table 1

Sample Problems - Table 1

  • A dive to 43 feet for one hour yields what pressure group?

43’

:60


Sample problems table 11

Sample Problems - Table 1

  • A dive to 43 feet for one hour yields what pressure group?

S

43’

:60


Sample problems table 12

Sample Problems - Table 1

  • A dive to 28 feet for 70 minutes yields what pressure group?

28’

:70


Sample problems table 13

Sample Problems - Table 1

  • A dive to 28 feet for 70 minutes yields what pressure group?

N

28’

:70


Sample problems table 14

Sample Problems - Table 1

  • A dive to 60 feet for 40 minutes yields what pressure group?

60’

:40


Sample problems table 15

Sample Problems - Table 1

  • A dive to 60 feet for 40 minutes yields what pressure group?

Q

60’

:40


Sample problems table 2

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 21

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 22

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 23

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 24

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 25

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

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 31

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 32

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 33

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 34

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 35

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 36

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 37

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

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

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 dives1

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 dives2

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

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 interval1

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 interval2

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 interval3

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

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

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.


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