BREITLING USA E56X21-Y Back-up survival instrument intended for use in the event of aviation accident. User Manual Part eight of eight of the Breitling Emergency

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Document ID	58121
Application ID	5hL8Zw97jXTFIyxa8uLfjA==
Document Description	Part eight of eight of the Breitling Emergency user manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	220.5kB (2756254 bits)
Date Submitted	1999-09-07 00:00:00
Date Available	2000-07-20 00:00:00
Creation Date	1999-08-24 23:13:00
Producing Software	Adobe Photoshop for Macintosh
Document Lastmod	1999-08-24 23:13:20
Document Title	Part eight of eight of the Breitling Emergency user manual
Document Creator	Adobe Photoshop 5.0

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5. IMPORTANT REMARKS
This watch's movement includes a battery end-of—lite (EOL) warning system, signalled by the digital
readout's flashing mode. The battery should then be replaced during the following days by an
authorized BRElTLING dealer Ask that the watch undergo a watertightness check whenever its battery
is changed.
This BREITLING chronograph was designed to withstand the pressure level inscribed on the case back
Please note: The crown should not be actioned while the watch is under water or when it is wet.
After exposing the watch to sea water, remember always to rinse its case and metal bracelet in fresh
running water Watches with a leather strap should not be worn under water to prevent its premature
deterioration.
Maintenance, replacement or repair work on your BREITLING watch should be entrusted only to an
authorized BREITLING servicing and repair center or to an official BREITLING dealer. Should any such
work be required during the warranty coverage period, remember to include the original Warranty
Certificate duly completed, dated and signed by the official dealer from whom the watch was
purchased.
21
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7. SUMMARY RESULTS OF FIELD TRIALS
Expen' men (111 observations
The masking effect of terrain was investigated It was observed that a topography that limits
the range, also facilitates localization.
Warming the watch increases the range in cold conditions.
Holding up the watch also improved the range, especially when lying on the ground.
The optimum length of the complementary, counterpoise antenna is 60cm.
The supplementary antenna (counterpoise) more than doubles the range, except if the
transmitter is on the ground, where it has no noticeable effect.
Overall assessment
Basic data:
Static interference increases at night, at lower latitudes, on land and in summer.
VHF is sensitive to the reflective and blocking effects of terrain.
VHF radio waves have a line-of—sight range
The theoretical maximum horizon range of a VHF signal depends on the relative heights of the
transmitter and receiver according to the formula: R = l.23(\/ht + Vhr), where:
R is the approximate distance in nautical miles, ht is the height of the transmitter in feet,
hr is the height (above ground) of the receiver in feet.
The practical range of the BREITLING EMERGENCY
with the supplementary antenna deployed is :
R = 0.3 (\/ht + xlhr)
with ht and hr in feet
The maximum range of the BRElTLlNG EMERGENCY is around 1.1 Nhe + Vhr),
which approximates the visual range.
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EMERGENQU
The table compares ranges with the receiver in an aircraft at H height above the transmitter :
EMERGENCY’S
practical range with
Theoretical
maximum VHF
EMERGENCY'S
maximum range
supplementary range with supplementary
antenna antenna
Feet Meters Nm Km Nm Km Nm Km
3.3 1 1 A 2.6 2.2 4 2 3.6
10 3 215 4.5 3.9 7 3.4 6.2
1 ,000 300 25 45 39 70 34 62
1 ,500 450 31 56 48 86 42 75
3,000 1,000 44 79 67 121 62 112
5,000 1,500 56 102 87 156 75 135
6,000 1,800 62 112 95 171 83 150
10,000 3,000 80 144 123 221 110 195
15,000 4,500 98 176 150 271 134 240
20,000 6,000 113 204 174 313 155 280
25,000 7,500 1 26 228 1 94 350 170 305
33,000 10,000 145 262 223 402 200 360

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