68

156.425

156.425

S

Boat Operations, Recreational

Yes

No

 

69

156.475

156.475

S

Boat Operations, Recreational

Yes

Yes

 

 

 

 

 

 

 

 

 

71

156.575

156.575

S

Boat Operations, Recreational

Yes

Yes

 

 

 

 

 

 

 

 

 

72

156.625

156.625

S

Boat Operations, Recreational

Yes

No

 

73

156.675

156.675

S

Port Operations

Yes

Yes

 

 

 

 

 

 

 

 

 

74

156.725

156.725

S

Port Operations

Yes

Yes

 

 

 

 

 

 

 

 

 

77

156.875

156.875

S

Port Operations

Yes

Yes

1 1W only

78A

156.925

156.925

S

Boat Operations, Recreational

Yes

No

 

 

 

 

 

 

 

 

 

79A

156.975

156.975

S

Commercial

Yes

Yes

 

 

 

 

 

 

 

 

 

80A

157.025

157.025

S

Commercial

Yes

Yes

 

81A

157.075

157.075

S

U.S. Government, Environmental Protection

Yes

Yes

4

 

 

 

 

 

 

 

 

82A

157.125

157.125

S

Agency Operations

Yes

Yes

 

U.S. Government, Canadian Coastguard

4

 

 

 

 

 

 

 

 

83A

157.175

157.175

S

U.S. Government, Canadian Coastguard

Yes

Yes

4

 

 

 

 

 

 

 

 

84

157.225

161.825

D

Public Correspondence, Marine Operator

No

Yes

 

85

157.275

161.875

D

Public Correspondence, Marine Operator

No

Yes

 

86

157.325

161.925

D

Public Correspondence, Marine Operator

No

Yes

 

 

 

 

 

 

 

 

 

87

157.375

161.975

D

Public Correspondence, Marine Operator

No

Yes

 

 

 

 

 

 

 

 

 

88

157.425

162.025

D

Public Correspondence, Marine Operator

No

Yes

 

88A

157.425

157.425

S

Commercial, Inter-ship Only

Yes

No

 

 

 

 

 

 

 

 

 

Special Notes on USA Channel Usage

1. LOW POWER (1 W) only.

2. Receive Only.

3. LOW POWER (1 W) initially. Override to HIGH POWER by holding down PTT, then holding down the H/L key. HI is indicated in the display. Used normally in bridge-to-bridge communications.

4. Lightly shaded simplex channels 03A, 21A, 23A, 61A, 64A, 81A, 82A, and 83A cannot be lawfully used in U.S. waters unless special authorization is obtained from the U.S. Coastguard. Not for use by the general public.

5. The letter “A” illuminated by the channel number indicates the USA channel is simplex.

This same channel is always duplex when selecting International. There is no “A” reference for International channels. The letter “B” is only used for some Canadian “Receive only” channels.

KEY: S = Simplex operating channel; D = Duplex operating channel.

Lowrance LHR-20/22Operation Instructions

19

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Lowrance electronic LHR-20 manual Special Notes on USA Channel Usage