Ameri-King AK-451-ELT - Manual (Page 92)

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communication with the ELT. Without the position data being transmitted, it is
necessary for the polar orbiting satellites to pass overhead, using Doppler Shift
technology to determine position. In a worst case scenario this could be a 3 to 4 hour
wait for a polar orbiting satellite to pass over. In addition, the accuracy of the position
fix is much better i.e. 22 meters (with GPS/Nav Position data) versus 1 to 2
kilometers for the standard 406.028 MHz system (without GPS/NAV Position data).
The ELT accept Aviation RS-232 data bus formats. By reprogramming the ELT with
the aircraft's 24 bit identification or serialized (long message format), this facilitates
moving the ELT from one aircraft to another when performing routine maintenance,
etc.
WARNING: The programming and labeling of the ELT must match the aircraft it is
installed in. The product label will have to be re-marked to reflect the
new programming and/or country of registry if a 24-Bit address long
message protocol ELT is reprogrammed.
Re-registration may not be required if the contact information does not change;
however, contact your local civil aviation or beacon registration authority when in
doubt.
Both serialized long message and 24-Bit address long message, re-programmed
ELT, that is moved to another aircraft, shall need to be re-registered Online or
by Mail.
The user must specify 24-bit long message programming when ordering the ELT.
Changing the programming protocol of the ELT can only be done at Ameri-King or
an authorized Ameri-King Repair Station.
3.4.10.2.
ELT/GPS Interface Communication Formats
The only Aviation RS-232 format which is supported is limited to the following
conditions:
Baud Rate (fixed): 9600
Parity: None
Data Bits: 8
Stop Bits: 1
In addition the RS-232 format must have a Start of Text (STX): an "A" identifier for
latitude; a "B" identifier for longitude and END of Text (ETX). The format expects
carriage returns but will not operate if there are line feeds.
The following manufacturer's navigation systems are known to interface with the AK-
451:
GARMIN INTERNATIONAL INC.:
• All Series: 150/ 250/ 400/420/430/ 500/520/530
HONEYWELL BENDIX-KING INC.:
• KLN 88, KLN89, KLN89B, KLN 90, KLN90B, KLN94, KLN900.
ARNAV SYSTEMS INC.:
• R50, R50i, STAR 5000, FMS 5000, MFD (Multi-Functional Display).