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RE>MIGPlan
Please find enclosed WWW information from MIGPlan software. The original is at
the address:
http://www.shadow.net/migplan.txt
===================================================================
"MiG Plan - Decompression Table Generator Software
MiG Plan is a full-featured decompression table generation program for IBM-PC
or Macintosh computers. Using this program qualified divers can "cut" custom
decompression tables. Tables as simple as repetitive "No-Deco"1 air dives to
complex multi-level, m
ulti-gas dives are calculated by MiG Plan.
MiG Plan's Features include:
Full Air, Nitrox, Tri-Mix and Heli-Ox dive table generation
User-Specified Decompression Algorithm
User-Specified Conservative/Aggressive Bias Factor
Multi-Level dive table generation
Oxygen decompression
CNS Oxygen dose tracking
Gas mix optimization planner
Automatic or manual decompression schedule control
Gas requirement planning
Single and repetitive dive table generation
Surface oxygen pre-dive "wash-out"
Run-time dive schedule listing
Air, Nitrox, Tri-Mix, and Heli-Ox dive table generation
________________________________________________________
MiG Plan allows the computer literate diver to "cut" his own custom
decompression table to meet his own individual needs. Divers who are not
satisfied with using tables made for the masses (or the US Navy) will enjoy the
flexibility and control afforded by MiG Plan.
Nitrox divers can generate tables that exactly track their nitrogen status
rather than the approximations made by using the EAD system to modify existing
air tables.
Mixed gas divers can now use MiG Plan to generate tables for the gas mixes they
have available to them, rather than having to attempt to match their gas mix to
an existing table. Imagine the increased confidence that a diver would enjoy by
analyzing the m
ix in his cylinders, then "cutting" a table based on what is in his cylinders!
Gas divers can (and are encouraged to) generate "back-up" tables to prepare for
the loss or malfunction of their decompression gas supplies. This is an area
that many divers may have unknowingly neglected in their dive planning. With
MiG Plan, divers can
play "What-If" (example: my oxygen bottle is lost during the dive and I have to
finish my deco on Nitrox...) with their personal computers rather than play
Russian Roulette with their bodies.
User-Specified Decompression Algorithm
User-Specified Conservative/Aggressive Bias Factor
__________________________________________________
There are over two million divers on this planet, not all of them have the same
predisposition to Decompression illness. One set of tables cannot satisfy all
the various diver/conditions/health/fitness combinations. MiG Plan allows the
savvy diver to choo
se the decompression algorithm (model) that he feels best suits his type of
diving. MiG Plan implements the #227#straight#228# algorithm with no
modification to
the published decompression models. MiG Plan allows the user to specify how
conservatively or aggressi
vely he wants to follow the "straight" algorithm by way or specifying a
#227#bias#228#
factor.
Divers have been doing this for years, but in the arbitrary and haphazard
manner of "cut 5 minutes from the No-Deco-Limits if you are a smoker, 5 more if
you are overweight..." or "take your ten-foot stop at fifteen feet, plus your
age, divided by your as
trological sign". This method does work after a fashion, but is more rooted in
voodoo than sound decompression theory. Sometimes these "safety factors" can do
more harm than good. MiG Plan allows the diver to logically apply the bias
factor to the decompr
ession tables before they are generated, ensuring that the calculations are
correct and consistent.
Using the bias factor, divers can make MiG Plan produce similar decompression
schedules to published tables.
Multi-Level dive table generation
__________________________________
While not all divers choose to make multi-level dives using tables, those who
do are restricted to planning the dives using only the deepest to shallowest
protocol. Unlike a dive computer, published tables cannot be used to develop
reliable dive plans tha
t follow a shallow-deep-shallow profile.
Technical and Cave divers can use MiG Plan to generate tables for multi-level
dives that do not follow the typical deepest to shallowest dive profile due to
the mission requirements. This often results in a shorter decompression,
reducing the chance of hy
pothermia, which is suspected in many "undeserved" cases of decompression
illness.
MiG Plan can be used as a desktop (or laptop!) simulator of dive computer.
Oxygen decompression
____________________
Technical divers have known for a long time that using oxygen reduces their
decompression obligation, but exactly how much has been difficult or impossible
to determine using conventional tables and dive computers. MiG Plan computes
the decompression sche
dule consistently, taking full advantage of the accelerated out-gassing
possible with oxygen.
CNS Oxygen dose tracking
________________________
MiG Plan tracks the diver's CNS dose "clock" that is always running when
breathing hyperoxic mixtures. The calculation is by the Hamilton method (i.e. %
of daily allowable dose).
The allowable partial pressure of oxygen during decompression is set by the
user.
Automatic or manual decompression schedule control
__________________________________________________
Normally divers will input the gases they will be using for decompression and
let MiG Plan "crunch the numbers" . MiG Plan sorts out the available gases and
develops a decompression schedule based upon the maximum operating depth (MOD)
and efficiency of d
ecompression of each gas.
In unusual or extreme cases the user can take manual control over the
decompression schedule generation. (example: "We cannot make any stops at 20
feet" or, "I prefer to make my shallowest stop in the shark cage at a depth of
15 feet.")
Gas requirements planning
_________________________
MiG Plan asks the user for his Surface Air Consumption rate. Based on this MiG
Plan, calculates the minimum2 amount of gas needed for the decompression
schedule.
Single and repetitive dive planning
___________________________________
MiG Plan allows calculation of single and repetitive air, nitrox and mixed gas
dives.
Surface oxygen pre-dive "wash-out"
_________________________________
MiG Plan allows a diver to calculate surface oxygen pre/post-dive "wash-out"
credit.
Run-time dive schedule listing
______________________________
MiG Plan lists all decompression schedules in the easy to follow "Run-Time"
format.
MiG Plan is available in three different versions; air only to certified
divers, air+nitrox to certified nitrox divers, and full mixed gas version to
certified mixed gas divers.
Technical specifications:
Minimum computer hardware requirements: IBM PC-XT or compatible with one
floppy drive[3], or a Macintosh 128[4].
Maximum allowable PpO2 during decompression can be adjusted by user at
run-time
Decompression models: 12-Compartment-Parallel, 16-Compartment-Parallel
Maximum number of decompression gases for any one dive: 8[5] (Autoplan Mode)
Maximum number of decompression gases for any one dive: Infinite (Manual Mode)
Number of choices for bottom gas: Infinite
For more information regarding technical specifications and publication
schedule contact:
MiG Technologies
A Division of Shadow Information Service, Inc
2000 NW 88 Ct.
Miami, Fl 33172
(305) 594-3450
or on the Internet: mig@sh*.ne*
[1]Of course we know that there is truly no such thing as a
no-decompression dive. All dives are decompression dives, some just don't
require decompression stops.
[2]This is the minimum, be sure to follow the appropriate gas cut-off rule
for any dive you may be on.
[3]DOS 2.11 or better
[4]System 4.2 or better (MiG Plan is System 7.x tolerant)
[5]6 for Macintosh version
MiG Technologies - A Division of Shadow Information Service, Inc
{PAGE|4}
=================================================================
With kind regards
Laszlo Abel - CMAS Instructor - Laszlo_Abel@MA*.CE*.CH*
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