When the ship is on the Greenwich meridian or the 180th meridian (LoLoLoLo = 0000 or 1800 respectively):
Qc = 1 or 7 (northern hemisphere) or
Qc = 3 or 5 (southern hemisphere);
When the ship is on the Equator (LaLaLa = 000):
Qc = 1 or 3 (eastern longitude) or
Qc = 5 or 7 (western longitude).
Code figure 00 Calm 01 5-14 02 15-24 03 25-34 etc. etc. 36 335-4 99 Variable, or all directions or unknown or waves confused, direction indetermininate
0 Positive or zero
Code figure 7 Values at selected depths (data points fixed by the instrument or selected by any other method) 8 Values at significant depths (data points taken from traces at significant depths)
(1) The depth is calculated from coefficients
a and b and the time t, as follows:
z = at + 10-3 bt2.
(2) All unassigned numbers are reserved.
Code figure 2 GEK (Geomagnetic ElectroKinetograph) 3 Ship's set and drift determined by fixes 3-6 hours apart 4 Ship's set and drift determined by fixes more than 6 hours but less than 12 hours apart