Appendix D Menu List and Materials
D-108
D.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')
One option can be selected from the options.
list('L')
Although this type is the same as enumerated, multiple items can be
selected.
float('F')
Decimal digits can be input.
integer('I')
Integers can be input.
coded string('A')
Free text
free text('S')
Free text
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.
Attribute:
Communication channel
Acronym: COMCHA
Code: 77
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 ' encodes the various VHF-channels used for
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];...
