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I think the first sentence is key, "Submersibles will be assigned
Class only after it has been demonstrated that their buoyancy and
their static and dynamic stability in in tact condition is
adequate FOR THE SERVICE INTENDED". Some of the lack of
specificity is because they can't conceive of every possible
application. They do however have quite a few specifics as you
outlined. Some of the testing won't apply (ie fuel load) and it's
possible that a narrow scope of service might lower number of
tests required.<br>
<br>
<br>
On 12/5/2013 4:08 AM, Alan James wrote:<br>
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id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"><br>
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<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">I'm
afraid there is nothing simple in this
section. It is lacking in a lot of
specifics.</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">There
are statements such as "shall
generally meet the standard defined</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">in
the following unless special
operational restrictions reflected in
the class</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">notification
allow a lower level. &
...Depending on the type of
submersible & the </div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">operation
area, the distance between the
waterline in fully surfaced condition</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">and
the upper edge of entrance openings,
air pipes,etc. which may be open</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">for
surfaced operation, has to be approved
by G.L.</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">
ABS has a minimum distance from the
waterline to the hatch opening of 30"</div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502">whereas
G.L. states; <span style="font-size:
14pt;">For surfaced; </span><span
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_3357"
style="font-size: 14pt;">a minimum </span><span
id="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2486"
style="background-color:
transparent; font-size: 14pt;">distance
between metacentric height &
center of gravity </span><span
id="yiv7320916847yui_3_13_0_ym1_7_1386063901473_17"
style="background-color:
transparent; font-size: 14pt;">of
10cm. (4") </span><span
id="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2596"
style="background-color:
transparent; font-size: 14pt;">And
for submerged, a minimum distance
between center of buoyancy </span><span
id="yiv7320916847yui_3_13_0_ym1_7_1386063901473_21"
style="background-color:
transparent; font-size: 14pt;">&
center </span><span
id="yiv7320916847yui_3_13_0_ym1_1_1386065276172_2496"
style="background-color:
transparent; font-size: 14pt;">of
gravity of 5cm (2") (same as ABS).
At no stage will G be above B.
(including after dropping the drop
weight)</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color: rgb(0, 0, 0); font-size:
14pt; font-family: HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif;
background-color: transparent;
font-style: normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2414"><span
style="font-size:14pt;"
id="yiv7320916847yui_3_13_0_ym1_7_1386061802447_54">In
the initial paper work sent before
construction, a detailed analyses of
stability is to</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color: rgb(0, 0, 0); font-size:
14pt; font-family: HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif;
background-color: transparent;
font-style: normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416"><span
style="font-size:14pt;"
id="yiv7320916847yui_3_13_0_ym1_7_1386065276172_24">be </span><span
style="font-size:14pt;background-color:transparent;"
id="yiv7320916847yui_3_13_0_ym1_1_1386065276172_3315">included.
This takes the form of analyzing
the heeling levers of 10 different
load cases in fresh & salt
water, 6 </span><span
style="background-color:
transparent; font-size: 14pt;">on
the surface & 4 submerged &
at 6 different heeling</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">angles.
So looks like 120 calculations. </span><span
style="background-color:
transparent; font-size: 14pt;">Heeling
forces from free liquid surfaces,
turning circles, wind, ice loads,
transference </span><span
style="background-color:
transparent; font-size: 14pt;">of
equipment & personal &
payloads from working devices have
to be considered.</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">There
needs to be sufficient ballast to
keep a minimum of 10% of the
pressure</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">hull
out of the water. The draught line
has to be marked on the hull. </span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">When
one major ballast tank is damaged
the hatch has to be able to open
without</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">water
coming in & the heeling angle
shouldn't exceed 22,5 degrees.</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">There
is an operational in water test at
the end of construction with
evaluation</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
'Helvetica Neue', Helvetica, Arial,
'Lucida Grande',
sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">of
the center of gravity upon which the
pre build calculations were based.</span></div>
<div
id="yiv7320916847yui_3_13_0_ym1_1_1386061802447_2502"
style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
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sans-serif;background-color:transparent;font-style:normal;"
class="yiv7320916847yui_3_13_0_ym1_1_1386063901473_2370
yiv7320916847yui_3_13_0_ym1_1_1386065276172_2405
yiv7320916847yui_3_13_0_ym1_1_1386136859721_2416
yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
transparent; font-size: 14pt;">Alan</span></div>
<div
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style="color:rgb(0, 0,
0);font-size:14pt;font-family:HelveticaNeue,
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yui_3_13_0_ym1_1_1386231496534_2369"><span
style="background-color:
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</span></div>
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<pre wrap="">_______________________________________________
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