PART I

Ice and Derelicts.

Information resjiecting ice and derelicts is given by means of ten figures divided into two groups of five figures each. These grou2:)S are preceded by the word " ice."

Two figures One figure One figure Three figures

Three figures

The day of the month {dd), according to Code I. The time of observation (2"), according to Code II. The kind of ice observed (/), according to Code III. The latitude of the ice observed {jJ JJ p), to tenths of

degree (see table below).

The longitude of the ice observed {p''p'p'), to tenths of

degree (see table below).

The first group consists of ddTIp.

The second group consists of ppp'p'p'-

Codes.

Code I. — Day of the Month.

The day of the month is given by two figures, of which the first may be zero : 01 to 31.

Code II, — Time of observation.

The time of observation is included between —

... Greenwich Mean Time.

and 4 a.m.

and 7 a.m.

and 10 a.m.

and 1 p.m.

and 4 p.m.

and 7 p.m.

and 10 p.m.

and 1 a.m.

Code No.

Code III. — Nature of Ice or Derelict observed.