T&T: Automatic/Manual Inflatable Live Vest

[Roger Bingham]

Hi All

> Remember that to
> comply with regulations an inflatable only counts as a PFD if you are
> wearing it. Types I and II need only be readily accessible.
> 
> Todd Mains
> Scappoose, OR



The following is based on a European perspective therefore some of the
terminology may be at variance with yours - please make allowances.

Inflatable lifejackets (ILJ) are the norm aboard serious sailing and motor
yachts in Europe. The equivalent to USCG Type I & II are sometimes found on
small sports boats.

  Todd Mains makes a valid point that inflatable lifejackets must be worn to
count - strange really - in my experience all lifejackets are pretty useless
unless worn. (Note - lifejackets - not buoyancy or flotation aids)

Having recently researched the subject with a view to replacing my 15 year
units - these are my observations.

Lifejackets are intended to turn an unconscious wearer onto his/her back and
hold the head clear of the water. The standard ILJ will provide 150kgf of
buoyancy. This is not adequate if you are heavy and/or wearing heavy
clothes, boots etc I am looking at a 275kgf rated unit from Crewsaver while
the 150kgf will be adequate for my small admiral.

I currently have units with auto/manual operation using a salt tablet which
dissolves and operates the CO2 cylinder. The new units will employ Hammar
(hydrostatic) triggers which are impervious to rain, spray and the
occasional green-one but will operate when submerged to a depth of about 20
inches. I have to add that I have never experienced an accidental inflation
with the old units.

The old units incorporate a harness and I will specify the new ones
similarly. Whether this is used to clip-on is a personal decision but it is
useful for recovery from the water though it adds a little extra weight.

Recent tests by magazines and maritime safety organisations have proved
beyond doubt that crutch straps are essential to the correct operation of
ILJ. If the unit is allowed to ride-up the body will not be supported high
enough for the head to clear the water and the wearer could actually slide
out of the ILJ.

Further, spray hoods (either integrated or separate) were also found to be
essential to reduce stress caused by flying spray and breaking waves and
also reduced heat-loss thus slowing the onset of hypothermia.

As far as accessories are concerned an effective whistle (one that works in
the shower) a torch, strobe or laser flare are pretty essential. 
PLBs, MOB dongles, handheld VHF, GPS, block of chocolate and a six-pack are
all options.

My notes above are based on the equipment I wish to have available if things
turn really nasty and going overboard is a real possibility. It is also
based on a realistic assessment of the difficulties in returning swiftly to
a MOB and recovering that person back on board. I have considered immersion
suits and made no decision as yet.

http://www.crewsaver.co.uk/Crewsaver/Download_Section/index.html

Regards

Roger Bingham
France