# Sample Problems - Table 1

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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?
J   :32
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?
J   :32   E
Sample Problems - Table 2
 A diver in pressure group P will be in what
pressure group after a 55 minute surface
interval?
P   :55
Sample Problems - Table 2
 A diver in pressure group P will be in what
pressure group after a 55 minute surface
interval?
P   :55   F
Sample Problems - Table 2
 A diver in pressure group I will be in what
pressure group after a surface interval of four
hours?
P 4:00
Sample Problems - Table 2
 A diver in pressure group I will be in what
pressure group after a surface interval of four
hours?
P 4:00 A
Sample Problems - Table 3
 If you are in pressure group K after your
surface interval, and you are planning a dive to
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
decompression limit?
K

60’

29
26      ANDL = 26
Sample Problems - Table 3
 After a surface interval you are in pressure
group P and planning a dive to 50 feet. What is

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

P

50’

50
30     ANDL = 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
22      RNT = 33
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
17      RNT = 63
Drawing the Dive Profile
 Avoid confusion and make sure you don’t miss
steps.        Surface Interval
between dives         Pressure Group
Pressure Group   (hours and minutes)   after Surface
after Dive 1                           Interval
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

50’              40’
RNT    25
Depth            Depth
+ABT   +60
40               60        TBT      85
Planning Multiple Repetitive Dives
 Indicate the final pressure group upon
surfacing after the following series of dives.

:24

55’          50’
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

55’              50’
RNT    47
Depth            Depth
+ABT   +30
50               30        TBT      77
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.

:

50’          40’
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

50’              40’
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.

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 views: 3 posted: 5/8/2013 language: English pages: 31