APRIL 9.] THE NEW ZEALAND GAZETTE. 723

(f) To understand the general requirements in regard to the supply
and storage of compressed air on board ship; to have a
good knowledge of the construction and working of the types
of air-compressors generally adopted; and to be familiar
with the use and management of the various valves, con-
nections, and safety devices employed:

(g) To be familiar with the methods of cooling the cylinders, pistons,
&c., of marine internal-combustion engines; and to under-
stand the precautions to be taken against overheating and
fracture of the various water-cooled parts:

(h) To have a good knowledge of the mechanisms of the con-
trolling arrangements of marine internal-combustion engines,
and understand how to deal with any defects arising therein;
also to be able to explain the chief causes of and the remedies
for faults and irregularities incident to the starting and
working of the engines:

(i) To be familiar with the nature and properties of the fuel and
lubricating oils generally used in internal-combustion en-
gines; and to have a knowledge of the principal physical
tests to which they are subjected:

(j) To understand what is meant by "flash-point," and to be
familiar with the conditions which promote the formation
of explosive mixtures of oil-vapour or gas and air in the
machinery spaces and oil-tanks; to have a sound knowledge
of the precautions to be taken against fire or explosion from
gas or oil-vapour, and the action of wire gauze when employed
for this purpose; to understand how to deal with an outbreak
of fire; and to have a satisfactory knowledge of the con-
struction and working of the types of fire-extinguishing
apparatus usually fitted in motor-ships:

(k) To possess a good working knowledge of the construction and
management of auxiliary steam boilers and machinery.

FIRST-CLASS ENGINEER.

(a) Age.

52. A candidate for a first-class engineer's certificate, whether
    ordinary or motor, must be not less than twenty-two and a half years
    of age.

(b) Sea Service.

The candidate must—

(1) Have served at sea for eighteen months in foreign-going or
intercolonial steamships of not less than 99 nominal horse-power
and/or foreign-going or intercolonial motor-ships of not less than
560 brake horse-power, on regular watch on the main propelling
machinery, as senior engineer in charge of the whole watch (see also
Rule 60); or

(2) Have served at sea, in home-trade steamships of not less than
99 nominal horse-power and/or home-trade motor-ships of not less
than 560 brake horse-power, for two years and three months as first
or second engineer; or three years as third or fourth engineer, being
senior engineer in charge of the whole watch on the main propelling
machinery.

(3) Possess, or be entitled to, a first-class certificate of service.

(c) Each Candidate must possess a Second-class Certificate.

The candidate must have performed the whole of the required
period of service while in possession of a second-class certificate of
the same description (ordinary or motor) as that for which he desires
to be examined.

At least two-thirds of the required service must have been in
ships of the type (steam or motor) to which the desired certificate
relates. The remainder of the service may have been in either steam
or motor-ships.