Does anybody know what 02 means on an admiralty chart. I can't type it like it shows it.Zero with a 2 lower beside it.
Complicated to explain, but the definitive answer would be,
It is a charted depth of 0.2m in that position, if the tide level falls to zero.
However, the tide level never falls to zero, so just add the chart datum to it. The chart datum is defined as the level to which the tide will seldom (if ever) fall to when astronomical factors are taken into consideration, and corresponds to the Lowest Astronomical Tide (LAT)
What you need to do is to look at the tidal stream atlas, and add the 0.2m to which ever applies of the following (tide dependent)
Mean High water springs, Mean High water Neaps, Mean Low water springs, and Mean Low water neaps.
Or in my case I just look at the chartplotter on the boat, and it gives me all that info and works out the depth for me !
If the 0.2 was underlined, then that is a drying height. You often see that on sandbanks etc.
Watching a newbie go out in a boat with no training, kind of worries me sometimes ! All the above is pretty basic stuff, but not a huge number of small boaters would be able to answer the question !
