DAFTAR FREQUENCY STASIUN PANTAI TELEPHONY & DISTRESS

What frequency do you mean?

The frequency listed or displayed for a radio station can differ, depending upon the radio receiver, the type of modulation used and how you are demodulating (or modulating) the signal, and the person listing the frequency.  This is especially true for high frequency (HF)  radios.  To help avoid confusion, three terms are used to describe these radio frequencies: assigned, carrier, and window.

Assigned Frequency

The assigned frequency is defined by the International Telecommunications Union Radio Regulations as "the centre of a frequency band assigned to a station".  In fact, it is the actual radio frequency of the signal being transmitted and received.  This is the most commonly used frequency designation.

Carrier Frequency

The carrier frequency is the frequency of the carrier, or the suppressed carrier of a signal.  For many, perhaps most radio signals, the carrier frequency and the assigned frequency are identical.  They are identical for AM (dual sideband) signals.  They are different for single sideband radios.  For maritime HF single sideband transmissions, which are always upper sideband, the assigned frequency is always 1.4 kHz greater than the carrier frequency. 

The carrier frequency designation, not the assigned frequency designation, is normally used in referring to single sideband transmissions.  History partially explains the reason for this.  Marine radiotelephony was originally AM (dual sideband), and the carrier and assigned frequencies were the same.  Certain frequencies, such as the distress and calling frequency 2182 kHz, were internationally recognized and known by any mariner using a marine radiotelephone.  When marine spectrum became scarce, the International Telecommunications Union moved all marine radiotelephony transmissions from dual sideband to the more efficient single sideband.   At first, the carrier signal was left untouched, so old AM radios could still receive the new single sideband transmissions.  In time however, the old carrier signal was eliminated.  The old marine frequencies such as 2182 kHz, commonly known and used, were retained and still displayed by marine radios.  Although no signal was actually transmitted on these carrier frequencies any longer, receivers still had to be tuned to those frequencies so that the voice signal could be properly demodulated and understood. 

Maritime digital signals, such as narrow band direct printing (NBDP or sitor) or digital selective calling (DSC), are transmitted on an assigned frequency 1.7 kHz above the (suppressed) carrier frequency.  Marine weatherfax signals are transmitted on an assigned frequency 1.9 kHz above the carrier frequency.  NBDP, DSC and weatherfax radios normally display the assigned frequency.  However, if a single sideband radio with a separate decoder unit is used to receive a sitor, DSC or weatherfax signal, it's likely that receiver would have to be tuned to the carrier frequency for the decoder to work properly.

The ITU assigned channel numbers to many single sideband and NBDP frequencies to help avoid this confusion.  However, DSC frequencies, and most simplex single sideband, NBDP and weatherfax frequencies do not have channel numbers.

Window Frequency

The window frequency is simply the frequency displayed (on the front panel numeric display "window") by a particular radio receiver or transmitter.   Depending on the equipment, the window frequency could be either the carrier or the assigned frequency.  Since the window frequency is dependent upon the equipment used, the term is not generally used by the USCG.

Is the frequency listed assigned or carrier?  What frequency do I tune my radio to?

The USCG tries to use standard convention in its listing of radio frequencies: Single sideband frequencies are generally carrier frequencies; all others are generally assigned frequencies.  When the carrier and assigned frequencies differ, we generally list both.

Read your radio's instruction manual, or talk to your marine electronics dealer, to learn whether your radio should be tuned to the assigned or the carrier frequency.

HF Single Sideband Maritime Radiotelephone Channels

HF Single Sideband Maritime Radiotelephone Channels

4 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     401            4357 kHz            4065 kHz

     402            4360                4068

     403            4363                4071

     404            4366                4074

     405            4369                4077

     406            4372                4080

     407            4375                4083

     408            4378                4086

     409            4381                4089

     410            4384                4092

     411            4387                4095

     412            4390                4098

     413            4393                4101

     414            4396                4104

     415            4399                4107

     416            4402                4110

     417            4405                4113

     418            4408                4116

     419            4411                4119

     420            4414                4122

     421            4417                4125 (Calling; distress 

                                              & safety working on

                                              4125 kHz simplex) 

     422            4420                4128

     423            4423                4131

     424            4426                4134 (USCG Calling)

     425            4429                4137

     426            4432                4140

     427            4435                4143

     428            4351              (varies)

     429            4354              (varies)

6 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     601            6501 (kHz)          6200 (kHz)(USCG Calling)

     602            6504                6203

     603            6507                6206

     604            6510                6209

     605            6513                6212

     606            6516                6215 (Calling; distress 

                                              & safety working on

                                              6215 kHz simplex)

     607            6519                6218

     608            6522                6221

8 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     801            8719 (kHz)          8195 (kHz)

     802            8722                8198

     803            8725                8201

     804            8728                8204

     805            8731                8207

     806            8734                8210

     807            8737                8213

     808            8740                8216

     809            8743                8219

     810            8746                8222

     811            8749                8225

     812            8752                8228

     813            8755                8231

     814            8758                8234

     815            8761                8237

     816            8764                8240 (USCG Calling)

     817            8767                8243

     818            8770                8246

     819            8773                8249

     820            8776                8252

     821            8779                8255 (Calling)

     822            8782                8258

     823            8785                8261

     824            8788                8264

     825            8791                8267

     826            8794                8270

     827            8797                8273

     828            8800                8276

     829            8803                8279

     830            8806                8282

     831            8809                8285

     832            8812                8288

     833            8291                8291

     834            8707              (varies)

     835            8710              (varies)

     836            8713              (varies)

     837            8716              (varies)

12 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     1201           13,077 kHz          12,230 kHz

     1202           13,080              12,233

     1203           13,083              12,236

     1204           13,086              12,239

     1205           13,089              12,242 (USCG Calling)

     1206           13,092              12,245

     1207           13,095              12,248

     1208           13,098              12,251

     1209           13,101              12,254

     1210           13,104              12,257

     1211           13,107              12,260

     1212           13,110              12,263

     1213           13,113              12,266

     1214           13,116              12,269

     1215           13,119              12,272

     1216           13,122              12,275

     1217           13,125              12,278

     1218           13,128              12,281

     1219           13,131              12,284

     1220           13,134              12,287

     1221           13,137              12,290 (Calling)

     1222           13,140              12,293

     1223           13,143              12,296

     1224           13,146              12,299

     1225           13,149              12,302

     1226           13,152              12,305

     1227           13,155              12,308

     1228           13,158              12,311

     1229           13,161              12,314

     1230           13,164              12,317

     1231           13,167              12,320

     1232           13,170              12,323

     1233           13,173              12,326

     1234           13,176              12,329

     1235           13,179              12,332

     1236           13,182              12,335

     1237           13,185              12,338

     1238           13,188              12,341

     1239           13,191              12,344

     1240           13,194              12,347

     1241           13,197              12,350

16 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     1601           17,242 kHz          16,360 kHz

     1602           17,245              16,363

     1603           17,248              16,366

     1604           17,251              16,369

     1605           17,254              16,372

     1606           17,257              16,375

     1607           17,260              16,378

     1608           17,263              16,381

     1609           17,266              16,384

     1610           17,269              16,387

     1611           17,272              16,390

     1612           17,275              16,393

     1613           17,278              16,396

     1614           17,281              16,399

     1615           17,284              16,402

     1616           17,287              16,405

     1617           17,290              16,408

     1618           17,293              16,411

     1619           17,296              16,414

     1620           17,299              16,417

     1621           17,302              16,420 (Calling)

     1622           17,305              16,423

     1623           17,308              16,426

     1624           17,311              16,429

     1625           17,314              16,432 (USCG Calling)

     1626           17,317              16,435

     1627           17,320              16,438

     1628           17,323              16,441

     1629           17,326              16,444

     1630           17,329              16,447

     1631           17,332              16,450

     1632           17,335              16,453

     1633           17,338              16,456

     1634           17,341              16,459

     1635           17,344              16,462

     1636           17,347              16,465

     1637           17,350              16,468

     1638           17,353              16,471

     1639           17,356              16,474

     1640           17,359              16,477

     1641           17,362              16,480

     1642           17,365              16,483

     1643           17,368              16,486

     1644           17,371              16,489

     1645           17,374              16,492

     1646           17,377              16,495

     1647           17,380              16,498

     1648           17,383              16,501

     1649           17,386              16,504

     1650           17,389              16,507

     1651           17,392              16,510

     1652           17,395              16,513

     1653           17,398              16,516

     1654           17,401              16,519

     1655           17,404              16,522

     1656           17,407              16,525

18/19 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     1801           19,755 kHz          18,780 kHz

     1802           19,758              18,783

     1803           19,761              18,786

     1804           19,764              18,789

     1805           19,767              18,792

     1806           19,770              18,795 (Calling)

     1807           19,773              18,798

     1808           19,776              18,801

     1809           19,779              18,804

     1810           19,782              18,807

     1811           19,785              18,810

     1812           19,788              18,813

     1813           19,791              18,816

     1814           19,794              18,819

     1815           19,797              18,822

22 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     2201           22,696 kHz          22,000 kHz

     2202           22,699              22,003

     2203           22,702              22,006

     2204           22,705              22,009

     2205           22,708              22,012

     2206           22,711              22,015

     2207           22,714              22,018

     2208           22,717              22,021

     2209           22,720              22,024

     2210           22,723              22,027

     2211           22,726              22,030

     2212           22,729              22,033

     2213           22,732              22,036

     2214           22,735              22,039

     2215           22,738              22,042

     2216           22,741              22,045

     2217           22,744              22,048

     2218           22,747              22,051

     2219           22,750              22,054

     2220           22,753              22,057

     2221           22,756              22,060 (Calling)

     2222           22,759              22,063

     2223           22,762              22,066

     2224           22,765              22,069

     2225           22,768              22,072

     2226           22,771              22,075

     2227           22,774              22,078

     2228           22,777              22,081

     2229           22,780              22,084

     2230           22,783              22,087

     2231           22,786              22,090

     2232           22,789              22,093

     2233           22,792              22,096

     2234           22,795              22,099

     2235           22,798              22,102

     2236           22,801              22,105

     2237           22,804              22,108

     2238           22,807              22,111

     2239           22,810              22,114

     2240           22,813              22,117

     2241           22,816              22,120

     2242           22,819              22,123

     2243           22,822              22,126

     2244           22,825              22,129

     2245           22,828              22,132

     2246           22,831              22,135

     2247           22,834              22,138

     2248           22,837              22,141

     2249           22,840              22,144

     2250           22,843              22,147

     2251           22,846              22,150

     2252           22,849              22,153

     2253           22,852              22,156  

25/26 MHz Duplex Channels

ITU Channel No.     Coast Transmit      Ship Transmit

     2501           26,145 kHz          25,070 kHz

     2502           26,148              25,073

     2503           26,151              25,076

     2504           26,154              25,079

     2505           26,157              25,082

     2506           26,160              25,085

     2507           26,163              25,088

     2508           26,166              25,091

     2509           26,169              25,094

     2510           26,172              25,097 (Calling) HF Single Sideband

                                             Maritime Radiotelephone Channels

Simplex Channels

These frequencies are shared and are not available for the

exclusive use of any station. 

4 MHz Band     6 MHz Band     8 MHz Band     12 MHz Band

4146 kHz       6224 kHz       8294 kHz       12,353 kHz

4149           6227           8297           12,356

               6230                          12,359

                                             12,362

                                             12,365

16 MHz         18/19 MHz Band 22 MHz Band    25/26 MHz Band

16,528 kHz     18,825 kHz     22,159 kHz     25,100 kHz

16,531         18,828         22,162         25,103

16,534         18,831         22,165         25,106

16,537         18,834         22,168         25,109

16,540         18,837         22,171         25,112

16,543         18,840         22,174         25,115

16,546         18,843         22,177         25,118

Maritime Channels Shared with the Fixed Service

The following channels in the band 4000-4063 kHz and 8100-8195 kHz may be used:

 - for supplementing ship-to-shore channels for duplex operation;

 - for intership simplex (single-frequency) and cross-band operation;

 - for cross-band working with coast stations;

 - for duplex operation with coast stations working in the band 4438-4650 kHz 

   or with Channels 834, 835, 836 and 837;

 - for ship-to-shore or shore-to-ship simplex operations (8100-8195 kHz 

   only).

                         4 MHz Carrier    8 MHz Carrier 

   Channel No.            Frequency kHz          Frequency kHz

         1                     4000           8101    

         2                     4003           8104

         3                     4006           8107

         4                     4009           8110

         5                     4012           8113

         6                     4015           8116

         7                     4018           8119

         8                     4021           8122

         9                     4024           8125

        10                     4027           8128

        11                     4030           8131

        12                     4033           8134

        13                     4036           8137

        14                     4039           8140

        15                     4042           8143

        16                     4045           8146

        17                     4048           8149

        18                     4051           8152

        19                     4054           8155

        20                     4057           8158

        21                     4060           8161

        22                      --            8164

        23                      --            8167

        24                      --            8170

        25                      --            8173

        26                      --            8176

        27                      --            8179

        28                      --            8182

        29                      --            8185

        30                      --            8188

        31                      --            8191

Global Maritime Distress & Safety System Radiotelephone Channels

These simplex frequencies are used for distress and safety communications, and (except for 2182 kHz) are not normally guarded.

          2182 kHz       8291 kHz

        4125           12,290

        6215           16,420