Справочник Пользователя для Metocean Data Systems MMB1000
Mini-Beacon 1000
Operation & Maintenance Manual
January 2012
TD 12-024 Version 1.1
© METOCEAN DATA SYSTEMS | All Rights Reserved
Page 6
5.3 Test Operation
The following quick test verifies the Mini-Beacon 1000 in standard configuration is functioning properly:
1. Turn device ON using magnet.
2. Turn on DF-500N DF Receiver or other receiver tuned to the correct frequency and check that there
is pulsing signal.
3. Mini-Beacon 1000 is ready to be deployed.
5.4 Direction Finding Receiver
Any Direction Finding (DF) Receiver that tunes to the preset frequencies may be used to locate the Mini-
Beacon 1000. MetOcean Data Systems manufactures the hand-held DF-500N receiver.
Beacon 1000. MetOcean Data Systems manufactures the hand-held DF-500N receiver.
When selecting a receiver or when ordering the Mini-Beacon 1000, one factor must be considered. Any
DF Receiver requires a certain amount of time to lock onto a signal, the DF-500N needs less than ¼
second, while some older shipboard DF Receivers need almost 2 seconds.
DF Receiver requires a certain amount of time to lock onto a signal, the DF-500N needs less than ¼
second, while some older shipboard DF Receivers need almost 2 seconds.
The Mini-Beacon 1000 is normally shipped with a duty cycle (D/C) of 2 seconds ON and 4 seconds OFF.
This duty cycle will work with virtually all DF Receivers.
This duty cycle will work with virtually all DF Receivers.
If you plan to use the ships DF Receiver, be sure to check that it is operating properly.
5.5 Range
Range of the beacon is essentially “line of sight”. To maximize range the beacon and DF Receiver
should be as high as possible.
should be as high as possible.
One can expect a minimum range of 2 nautical miles working to a Zodiac and 2 to 4 nautical mile range if
you are on the deck of a vessel 25 feet off the water.
you are on the deck of a vessel 25 feet off the water.
The following formula can be used as an approximate guide for range: (beacon at surface)
RANGE (Nautical Miles) =
Where H = height of DF Receiver antenna in feet above the water’s surface.