NAVTEX
VASUDEVAN PONDICHERRY PH: 91 96299 80476
1.
What is the use of NAVTEX?
To
receive MSI
2.
What is NAVTEX?
Navigational
telex (type of NAVTEX - TELEX type)
3.
Who broadcasts the MSI?
From
different information providers:
Hydrographic
office, Meteorological office, RCC
To
NAVTEX stations
NAVTEX
stations broadcast MSI
4.
What is the range of
NAVTEX?
Up
to 250 NM
(it
differs from station to station. Maximum range is 250 NM
Range
can be checked in ALRS VOL.5)
5.
What is MSI?
Maritime
Safety Information
6.
What are the frequencies of
NAVTEX?
518
KHz – ENGLISH 490 KHz regional language 4209.5 KHz – HF NAVTEX frequency
7.
What is the power output of
NAVTEX?
No
power out put. It is a receiver
8.
What is the emission?
F1B
9.
What type of aerial is
used?
Active
aerial (pre tuned amplifier at the base of the aerial)
10.
What types of messages are
important?
A,
B, D,and L
11.
What type of messages can
not be deselected?
A,
B, D and L
12.
How do you select messages?
See
procedures
13.
How do you select the
stations?
See
procedures
14.
Which publication do you
refer?
Refer
ALRS VOLUME 5 or 3
Or
ITU list of radio determination and special
service stations
15. If NAVTEX is failure, how will you receive MSI?
Switch
on MF/HF transceiver, tune on ......... KHz
NBDP
and printer ON
16.
In sea area A3, how do you
receive MSI?
Through
safetyNET/EGC
17.
What is the alternate for
NAVTEX?
EGC
18.
What is the header code and
what does it indicate?
Phasing
signal for 10 seconds
It
activates the NAVTEX receiver from the mute level
19. What
do you receive in NAVTEX?
Phasing
signal for 10 seconds
ZCZC
– starting code (beginning of message)
B1
(A-Z) – station ID
B2
(A-Z0 – type of message
B3
B4 – serial numbers (00-99)
Message
– main message
NNNN
– termination code (end of message)
20. What
is the station identification?
A
– Z
21. What
is the message identification?
A
– Z
22.
How many NAVAREAS are
there?
21
INDIA
– NAVAREA VIII
23.
What is NAVAREA?
Navigable
water areas are subdivided for the purpose of MSI
BROADCASTS
24. Message
identification
A
– navigational warning
B
– meteorological warning
D
– search and rescue information/piracy armed robbery
E
– meteorological forecasts
F
– pilot message
G
– AIS message
L
– additional navigational warning
M-Y
– not used
Z
– no message on hand
What are the mandatory
messages?
A,
B.D and L
Important feature:
If
the incoming messages are repeated, it will not be printed.
Messages
are identified with the serial numbers.
Except
serial number 00
00 is SAR message
ABBREVIATIONS
NO - Number of messages received
ID - B1 B2 B3 B4
Date - date of message received
Time - time of message received
Line - line number of transmission
Freq - receiving frequency
Tag - Tag ser, not to delete for 62 hours
SAR - SAR information
N - New message
P - Message ready for printing
VASUDEVAN PONDICHERRY PH: 91 96299 80476
Special
features
Station selection/refuse
Message selection/refuse
In this,
Mandatory messages cannot be
deselected
Technical
description
Input power supply – 12 V/24 V
Power consumption – 10 W (at 24 V DC)
Messages are
stored for 62 hours,
after 62 hours those messages are automatically
Deleted.
For printer,
what type of paper is used?
Thermo sensitive paper
EXRA
QUESTIONS:
You are sailing from Miami to Ecuador
via panama canal. Which NAVAREA will you programme?
you can please download GMDSS CLASSES VIDEOS from YOUTUBE
key word: GMDSS VASU
key word: GMDSS VASU
