Table AIV-18.—WMO CODE 5239
WMO CODE 5239
Zi - Present ice situation and trend of conditions over preceeding 3 hours.
Code
Description
0
Ship in open water with floating ice in sight.
/
Unable to report; low visibility or darkness.
1
Ice easily penetrable - condition improving.
Ship in ice.
2
Ice easily penetrable - condition unchanging.
3
Ice easily penetrable - condition worsening.
4
Ice difficult to penetrate - condition improving.
5
Ice difficult to penetrate - condition unchanged.
6
Ice forming and floes freezing
Ice difficult to penetrate, conditions worsening.
together.
7
Ice under slight pressure.
8
Ice under moderate or severe
pressure.
9
Ship beset.
Table AIV-19.—WMO CODE 0439
WMO CODE 0439
bi - Ice of land origin.
code
Description
0
No ice of land origin.
1
1 - 5 bergs, no growlers or bergy bits.
2
6 - 10 bergs, no growlers or bergy bits.
3
11 - 20 bergs, no growlers or bergy bits.
4
1 - 10 growlers or bergy bits, no bergs.
5
>10 growlers or bergy bits, no bergs.
6
1 - 5 bergs with growlers or bergy bits.
7
6 - 10 bergs with growlers or bergy bits.
8
11 - 20 bergs with growlers or bergy bits.
9
>20 bergs with growlers or bergy bits -
major navigation hazard.
/
Unable to report because of darkness or visibility.
AIV-19
