Maritime Radio Use in the VHF Frequency Range. Motorola ASTRO APX 7000 Series, APX 7000L, ASTRO APX 6000XE Series

Maritime Radio Use in the VHF

Frequency Range

Special Channel Assignments

Emergency Channel

If you are in imminent and grave danger at sea and require emergency assistance, use VHF Channel 16 to send a distress call to nearby vessels and the

United States Coast Guard. Transmit the following information, in this order:

1

“MAYDAY, MAYDAY, MAYDAY.”

2

“THIS IS _____________________, CALL SIGN

__________.” State the name of the vessel in distress 3 times, followed by the call sign or other identification of the vessel, stated 3 times.

3

Repeat “MAYDAY” and the name of the vessel.

4

“WE ARE LOCATED AT

_______________________.” State the position of the vessel in distress, using any information that will help responders to locate you, e.g.:

• latitude and longitude

• bearing (state whether you are using true or magnetic north)

• distance to a well-known landmark

• vessel course, speed or destination

5

State the nature of the distress.

6

Specify what kind of assistance you need.

7

State the number of persons on board and the number needing medical attention, if any.

8

Mention any other information that would be helpful to responders, such as type of vessel, vessel length and/or tonnage, hull color, etc.

9

“OVER.”

10

Wait for a response.

11

If you do not receive an immediate response, remain by the radio and repeat the transmission at intervals until you receive a response. Be prepared to follow any instructions given to you.

Non-Commercial Call Channel

For non-commercial transmissions, such as fishing reports, rendezvous arrangements, repair scheduling, or berthing information, use

VHF Channel 9

.

Operating Frequency Requirements

A radio designated for shipboard use must comply with Federal Communications Commission Rule Part

80 as follows:

87

English

88

English

• on ships subject to Part II of Title III of the

Communications Act, the radio must be capable of operating on the 156.800 MHz frequency.

• on ships subject to the Safety Convention, the radio must be capable of operating:

• in the simplex mode on the ship station transmitting frequencies specified in the

156.025 – 157.425 MHz frequency band, and

• in the semiduplex mode on the two frequency channels specified in the table below.

Note:

Simplex channels 3, 21, 23, 61, 64, 81, 82, and 83 cannot be lawfully used by the general public in US waters.

Additional information about operating requirements in the Maritime Services can be obtained from the full text of FCC Rule Part 80 and from the US Coast

Guard.

Table 1: VHF Marine Channel List

Channel

Number

Frequency (MHz)

Transmit Receive

11

12

13**

14

15**

16

17**

7

8

9

10

*

4

1

2

5

6

156.550

156.600

156.650

156.700

156.750

156.800

156.850

156.050

156.100

156.150

156.200

156.250

156.300

156.350

156.400

156.450

156.500

156.550

156.600

156.650

156.700

156.750

156.800

156.850

160.

6

50

160.700

160.750

160.800

160.850

–

160.950

–

156.450

156.500

63

*

65

28

60

*

62

24

25

26

27

18

19

20

*

22

*

157.400

156.025

156.075

156.125

156.175

156.225

156.275

156.900

156.950

157.000

157.050

157.100

157.150

157.200

157.250

157.300

157.350

162.000

160.625

160.675

160.725

160.775

160.825

160.875

161.500

161.550

161.600

161.650

161.700

161.750

161.800

161.850

161.9

0

0

161.950

*

*

*

77**

78

79

80

73

74

75

76

66

67**

68

69

71

72

156.325

156.375

156.425

156.475

156.575

156.625

156.675

156.725

***

***

156.875

156.925

156.975

157.025

157.0

7

5

157.125

157.175

–

161.525

161.575

161.

6

25

161.675

161.725

161.775

160.925

156.375

156.425

156.475

156.575

–

156.675

156.725

***

***

English

89

84

85

86

87

88

157.225

157.275

157.325

157.375

157.425

161.825

161.875

161.925

161.975

162.025

Note:

*

Simplex channels 3, 21, 23, 61, 64, 81, 82, and 83 cannot be lawfully used by the general public in US waters.

**

Low power (1 W) only.

***

Guard band.

Note:

A – in the Receive column indicates that the channel is transmit only.

90

Declaration of Compliance for the Use of

Distress and Safety Frequencies

The radio equipment does not employ a modulation other than the internationally adopted modulation for maritime use when it operates on the distress and safety frequencies specified in RSS-182 Section 7.3.

English

Technical Parameters for Interfacing External

Data Sources

Input

Voltage

(Volts

Peak-topeak)

RS232

18V

Max Data

Rate

28 kb/s

Impedance

5k ohm

USB

3.6V

12 Mb/s

90 ohm

SB9600

5V

9.6 kb/s

120 ohm