the newstandard：90 dasys
on ships which arebuilt on or after 1. july 2014,underwater locating devicesmust ensure
a regulatorytransmission time of at least 90 days.
minimum performance standards
operatingdetails
// actuation:automatically by both fresh and salt water atall depths from 0.15 m (0.5 ft) to 6096m (20 000 ft) within 4 hours afterimmersion
//operating depth: surface to 6000 m (surface to20.000 feet)
//operating temperature: -2 °c (28 °f) to+38 °c (100 °f).
//radiationpattern: 80% of aspherical pattern
//operatingfrequency: 37.5 ± 1 khz
//pulse length:9.0 ms minimum.
//repetitionrate: 0.9 pulse/s minimum
//operating life: 90days
acousticoutputs on activation
//initialoperation: 106 n/m2 (1060 dyne/cm2) r.m.s.(during the pulse) pressure normalized to 1metre range, that is, at a level of 160.5 dbvs 1 μpa at 1 metre
//immediatelyafter 90 days continuous operation: 70n/m2 (700 dyne/cm2) r.m.s.(during the pulse) pressurenormalized at 1 metre range, that is, at alevel of 157 db vs 1 μpa at 1metre.
dimensi
//length 98 mm(3,85 inch)
//diameter 33 mm(1,3 inch) same as pt9c-proof
//weight, beacon:187 g (6.6 ounces)
powersource
//self-contained,lithium battery (fieldreplaceable)

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