CYLINDER LINERS FOR ALL
APPLICATIONS INCLUDING
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P.O. Box :127 Carsi TR-01322 ADANA/TURKEY
Tel: +90 322 4410012 Fax : +90 322 4410086
• Flexibility of supply
• Fully machine or semimachine cylinder
liners for your tailor made requirements
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you can depend on
• Marine Evacuation
Circle 415 on Reader Service Card Circle 360 on Reader Service Card
Circle 259 on Reader Service Card 133
U. S. Agent
®1®METRIC MARINE SERVICES
Tel: (800)644-2601 • Fax: (904)241-2733
• Life rafts;
throw overboard
davit launch &
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Systems
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(Continued from page 116)
Inmarsat communications system, both of
which have proved their reliability over many
years of use by mariners and others. The use of
geostationary satellites greatly increases the
speed at which a distress alert can be delivered,
as no time is lost waiting for a satellite to
appear over the horizon.
The system features both float free buoy type
EPIRBs (emergency position indicating radio
beacons) for use onboard larger vessels as well
as hand portable versions for yachts, lifeboats
and similar applications.
Both types of terminal include a built in GPS
receiver so that the position of the unit is con-
stantly updated to an accuracy of better than 61
ft. (200 m). This compares with an accuracy of
about five kilometers for the best of the current
emergency alerting systems. The terminals
also include an Inmarsat satellite communica-
tions transmitter which automatically trans-
nits the coded distress alert to all accessible
"nmarsat satellites.
Inmarsat transmitters use the L band range
if frequencies, specifically allocated for search
ind rescue (SAR) maritime communications
>ecause they are virtually unaffected by
idverse meteorological conditions and interfer-
nce from other L band spectrum users.
Improved power budget, made possible
brough the three new Inmarsat E satellites
lunched last year, leads to a much better
ransfer of distress messages through the satel-
te. A distress signal can be triggered manu-
lly or automatically when a float free terminal
i submerged. As a minimum the message will
mtain the identity of the terminal and its posi-
on at the time of the alert. This information
will be transmitted via an Inmarsat satellite to
an LES where it will trigger an alarm while
being automatically relayed via a fixed landline
connection, to a Rescue Coordination Center
(RCC). Many vessels will carry an on bridge
display showing the status and position reading
from the EPIRB. In an emergency, crew mem-
bers will have the option of triggering an alert
transmission and including, via a short code
keyboard, additional information on the nature
of the emergency. Similar information can be
input by the user of a portable terminal. Once
triggered, terminals will continue transmitting
for 48 hours unless de-activated manually.
Some models will also feature a search and res-
cue radar transponder (SART) beacon to enable
rescuers to home-in using radar once they
reach the area of the transmitted position.
Land earth stations (LESs) operating with the
(Continued on page 133) Krieger Inmarsat E EPIRB
September, 1997
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