The 9 GHz SAR
transponder (SART), in addition to meeting the requirements of the relevant ITU-R
Recommendation and the general requirements set out in resolution A.694(17), should comply with the following
The SART should be capable of indicating the location of a unit in
distress on the assisting units' radars by means of a series of equally spaced dots
(see resolution A.530(13)).
2.1 The SART should:
capable of being easily activated by unskilled personnel;
.2 be fitted with means to prevent inadvertent activation;
.3 be equipped with a means which is either visual or
audible, or both visual and audible, to indicate correct operation and to alert
survivors to the fact that a radar has triggered the SART;
.4 be capable of manual activation and deactivation; provision for
automatic activation may be included ;*
.5 be provided with
an indication of the stand-by condition;
.6 be capable of
withstanding without damage drops from a height of 20 m into water;
.7 be watertight at a depth of 10 m for at least 5 min;
.8 maintain watertightness when subjected to a thermal shock of 45¡É
under specified conditions of immersion;
.9 be capable of
floating if it is not an integral part of the survival craft;
.10 be equipped with buoyant lanyard, suitable for use as a tether, if it
is capable of floating;
.11 not be unduly affected by
seawater or oil;
.12 be resistant to deterioration in
prolonged exposure to sunlight;
.13 be of a highly visible
yellow/orange colour on all surfaces where this will assist detection;
.14 have a smooth external construction to avoid damaging the
survival craft; and
.15 be provided with a pole or other
arrangement compatible with the antenna pocket in a survival craft in order to
comply with 2.4, together with illustrated instructions.
2.2 The SART should have sufficient battery capacity to
operate in the stand-by condition for 96 h and, in addition, following the stand-by
period, to provide transponder transmissions for 8 h when being continuously
interrogated with a pulse repetition frequency of 1 kHz.
2.3 The SART should be so designed as to be able to operate
under ambient temperatures of - 20°C to + 55°C. It should not be damaged in stowage
throughout the temperature range of - 30°C to + 65°C.
2.4 The height of the installed SART antenna should be at
least 1 m above sea-level.
2.5Horizontal polarization should be used for transmission and
2.6 The SART should
operate correctly when interrogated at a distance of up to at least 5 nautical miles
by a navigational radar complying with resolutions A.477(XII) and A.222(VII), with
an antenna height of 15 m. It should also operate correctly when interrogated at a
distance of up to 30 nautical miles by an airborne radar with at least 10 kW peak
output power at a height of 3,000 ft.
Technical characteristics of the SART
should be in accordance with Recommendation ITU-R M.628-2.
In addition to the items
specified in resolution A.694(17) on general
requirements, the following should be clearly indicated on the exterior of the
.1 brief operating instructions; and
.2 expiry date for the primary battery used.
* If an on-board test is performed using a shipborne 9 GHz radar, activation of
the SART should be limited to a few seconds to avoid harmful interference with
other shipborne radars and excessive consumption of battery energy.