On Jun 11, 11:58*am, wrote:
Fred
Here is some more 4 ya fred hope you enjoy. there is a test on Friday:
"...Painter-Securing HRUs. In Europe, painter-securing HRUs perform
the three-part functionof (1) a full-strength securing point for the
inboard end of the sea painter; (2) anattachment point for the float-
free weak link on the same end of the sea painter; and (3) arelease
point for one end of the strap restraining the lifesaving equipment.
In contrast, theNavy/Coast Guard style devices shown on Enclosure (3)
perform only the third of thesethree functions. Enclosure (4) shows
how the painter-securing HRUs differ from theNavy/Coast Guard type.
Unproved versions of these devices are available in the U.S.
foruninspected vessels, and there may soon be Coast Guard approved
versions that can beused on inspected vessels.e.Installation of Navy/
Coast Guard HRUs. Enclosure (5) shows the proper installation ofany
one of the three HRUs discussed under paragraph 3-c. Variations of
this arrangementmay be necessary to meet the specific features of
different vessels, but all installationsshould conform to the
following
1)An HRU and its gripe assembly require a preload tension
applied by a turnbuckleso that any movement of the HRU plunger, by
either water pressure or manualforce, will separate the two halves of
the device and free the gripe.(2)The correct installation of an HRU
keeps it solely under tension loading with thedevice suspended between
its end fittings. The HRU must not be subjected to sideloads or
bending loads resulting from contact with the lifesaving device or
anyother object. An HRU may fail to operate if it is forced into
bending or contactwith a liferaft container as shown in Enclosure (6).
(3)The release button on the end of the plunger must face away from
the raft or otherdevice on the side from which it is approached, so
that the release plunger isaccessible for manual operation.(4)The sea
painter is secured to a float-free weak link which is in turn shackled
to thedeck or strong point on the vessel. An inflatable liferaft comes
equipped with itsown weak link. The weak link for a life float or
buoyant apparatus must becertified to Coast Guard requirements --46
CFR 160.073-- as indicated on itsidentification tag. Note that the sea
painter is not connected to the Navy/CoastGuard style HRU in any way.
(5)The gripe assembly can be released by slackening the turnbuckle or
by pushing inon the release plunger. If the lifesaving device is to be
moved to a launchingstation, the painter should be led to the station
directly in a straight line, over any
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Enclosure (1) to NVIC 4-862obstructions. If this cannot be done, the
painter and weak link should bedisconnected and rescued at an
appropriate strong point near the launching station.(f)Installation of
painter-Securing HRUs. Enclosure (7) shows the correct installation of
apainter-securing HRU. Variations may be necessary to account for
design differences, orto overcome specific installation problems on a
particular vessel, but all installationsshould conform to the
following
1)painter-securing HRUs need to have a pelican hook in the
gripe arrangement toprovide for manual release. The pelican hook must
be located where it is readilyaccessible for manual release. A special
tool provided with the HRU will also openit, but this tool is intended
for maintenance and will not normally be stowed in aplace convenient
to the HRU.(2)When they obtain Coast Guard approval, painter-securing
HRUs will probably beequipped with gripe-tensioning springs. In any
case, the gripe should be snug whenthe hook is closed and the gripe is
assembled to the release.(3)The release is secured to the deck or to a
bracket on a liferaft cradle intended forthis purpose. Like the Navy/
Coast Guard release, the painter-securing HRU mustnot contact a raft
container or any other object that would impart a side load orbending
load.(4)The sea painter is attached directly to the painter-securing
'[RU by a link orshackle. Any weak link supplied with an inflatable
liferaft on the inboard end of itspainter should be removed and
discarded(5)In place of the discarded weak link discussed in
Subparagraph 3-f(4), the HRUwill have its own weak link of 500 lbs.
breaking strength. One end of the weak linkis attached to the deck
either directly or through the part of the HRU attached tothe deck.
The other end is attached to the link or shackle at the end of the
painter.The link or shackle is attached to the HRU so that the weak
link is not a loadcarrying part of the painter system until the
release opens. Note especially that forinflatable liferafts the weak
link used should be the one supplied with the releaseand of the 500
lb. strength as required for an inflatable liferaft. For life floats
andbuoyant apparatus, the weak link must be one certified under 46 CFR
160.073 ofthe proper strength, and of a length that will work properly
with the release.(6)The gripe assembly can be released by opening the
pelican hook, or using thespecial tool to open the HRU. If the raft is
to be moved to a launching station, thepainter should be led to it in
an straight line, over any obstructions. A raft using apainter-
securing '[RU should not normally be installed in a place where there
is nodirect access to a launching station, since it is not possible to
move the weak linkand painter to a new securing point, without having
the special tool that opens theHRU..."