RNLI FISHING SAFETYHYDROSTATIC RELEASE UNIT (HRU)INSTALLATION

1. If vessel sinks, HydrostaticRelease Unit activates, andliferaft attempts to float to surface

Senhouse slipIt is recommendedthat lashingarrangements arechecked to ensure themanual quick releasearrangement can beeasily released.

3. Tension on weak link will cause it to break ensuringliferaft does not go down with the boat

2. Tension on painter will causeliferaft to inflate

Painter

Weak link

Strong point

When immersed,chisel cuts rope andreleases lashing.

HRU

Correct installation of older version HRU

Ensure strapping is tight otherwisechisel in HRU maynot cut rope.

1. HRU will activate

2. Liferaft will be released but will not inflate andwill sink

1. HRU will activate

2. Liferaft will float free and eventually inflate

3. Because the painter is secured directly to thestrong point, the liferaft will NOT be released tothe surface EVEN IF it is attached to the weaklink as well

Painter secured to HRU(not through weak link)

Painter secured directly to strong point

To contact the fishing safety team please telephone 0800 328 0600 or

email: fishingsafety@rnli.org.uk www.lifeboats.org.uk

Registered Charity No. 209603

INCORRECT INSTALLATIONOF HRU

X1. HRU will activate

2. Liferaft will float free and eventually inflate

3. Because the painter is secured to the slip, theliferaft will NOT be released to the surface

X

X1. Will work correctly for automatic release, but:

2. If liferaft is thrown overboard in an emergency (or comes adrift at sea) it may be lost

Painter secured only to weak link (older version only)

X

Painter secured to senhouse slip

X