Chapter 7 — COMMUNICATIONS EQUIPMENT AND OPERATIONAL PROCEDURES 



Table 7-2. — Time Conversion Table 



1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 



1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 



2000 

 2100 

 2200 

 2300 



:4oo 



2100 

 2200 

 2300 



2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 



2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 



2300 



2400 



0TW 



0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 



2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0100 



0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0100 

 0200 



0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 



0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 



0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0100 

 0200 

 0300 

 0400 

 0500 



0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 



0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 



0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 



1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 



1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0TOT 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 



1200 

 1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 



1300 

 1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 

 0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 



1400 

 1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 



H 



1500 

 1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 



I 



1600 

 1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 



1700 

 1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 



1800 

 1900 

 2000 

 2100 

 2200 

 2300 

 2400 



0100 

 0200 

 0300 

 0400 

 0500 

 0600 

 0700 

 0800 

 0900 

 1000 

 1100 

 1200 

 1300 

 1400 

 1500 

 1600 

 1700 



209.439 



The SSICs to be assigned may be obtained 

 from the manual for Standard Subject Identifi- 

 cation Codes SECNAVINST 5210.11. 



The SSICs are not required in messages 

 transmitted over dedicated or closed networks 

 if the message is to remain within the network. 

 This exception as stated in OPNAV Instruction 

 2100.1 includes closed weather networks such 

 as NEDN and COMEDS and NEDS. Any open 

 network must include the SSIC. 



Joint Messageform 

 (DD Form 173) (OCR) 



Joint messageform (DD Form 173) (OCR) 

 replaces messageforms currently in use. Con- 

 version to this joint form is for the purpose 

 of facilitating continuity within the communication 

 systems and provide an efficient means for 

 automatic processing by which messages com- 

 ing into the computer system are translated 

 into machine language. (Optical character rec- 

 ognition (OCR) systems are fast becoming an 

 important link to electronic data processing sys- 

 tems as optical readers provide computer input 

 by reading directly from typewritten copy and 

 converting this data into electronic impulses 

 recognizable to the computer.) The procedures 



for use are the same as presented in pre- 

 ceding paragraphs. An example of a completed 

 DD Form 173 (OCR) is illustrated in figure 

 7-20. 



Radioteletype and Radiofacsimile 



Fleet Weather Centrals and Facilities origi- 

 nate major radioteletype and radiofacsimile 

 broadcasts. The frequencies and schedules of 

 these broadcasts are listed in the Worldwide 

 Marine Weather Broadcasts Manual. 



A myriad of weather reports are received 

 by Fleet Weather Centrals and Facilities daily 

 from operating weather units. In addition, 

 FLEWEACENs and FLEWEAFACs have a re- 

 quirement for preparing forecasts and warn- 

 ings for their areas of responsibility. 

 Transmission of this weather data via radio- 

 teletype is similar to the procedures described 

 earlier in this chapter — a message tape must 

 be prepared and transmitted on schedule. Trans- 

 mission of weather charts via radiofacsimile 

 requires proper installation of the weather chart 

 on the facsimile transceiver and a scheduled 

 transmission. Procedures for the transmission of 

 weather data via radioteletype and radiofac- 

 simile vary at different naval weather units. 

 Refer to local operating instructions for proper 

 procedures. 



145 



