Enc Object Attributes; Attribute: Communication Channel - JRC ECDIS Instruction Manual

B.6.5

ENC object attributes

The input rules of the ENC object attributes that are handled by manual update are specified in
"S-57 Appendix A Chapter 2 – Attributes". The following six types of ENC object attributes are
available.
Attribute type
enumerated('E')
list('L')
float('F')
integer('I')
coded string('A')
free text('S')
To display an object correctly in manual update, the input must comply with the specification
indicated in "S-57 Appendix A Chapter 2 - Attributes".
For types 'E', 'L', and 'F', the options and the input range are displayed in the input dialog. For
types 'A' and 'S', input the values according to the rules that are provided below.
Acronym: COMCHA
Attribute type: A
Definition:
A channel number assigned to a specific radio frequency, frequencies or frequency band.
Expected input:
enter specific VHF-Channel
References:
INT 1: IM 40;
M-4: 488;
The attribute ' communication channel '
communication.
Indication:
Each VHF-channel should be indicated by 2 digits and up to 2 characters (A-Z);
e.g. VHF-channel 7 -> > 07'
VHF-channel 16 -> > 16';
The indication of several VHF-channels is possible;
Format:
[XXXX];[XXXX];...
Appendix B Menu List and Materials
One option can be selected from the options.
Although this type is the same as enumerated, multiple items can be
selected.
Decimal digits can be input.
Integers can be input.
Free text
Free text

Attribute: Communication channel

encodes the various VHF-channels used for
B-104
Code: 77