A white light is to be shown while at anchor, visible
all around the horizon.
A whistle, siren, fog-horn or something of similar
nature is to be used as a fog signal. A "prolonged blast"
is from four to six seconds' duration.
One prolonged blast at one-minute intervals or less
must be given when the boat has way upon her.
In sailing vessels, one blast at one-minute intervals or
less must be given when on starboard tack; two blasts at
one-minute intervals when on port tack; with wind abaft
the beam, three blasts at similar intervals.
n,g,t,7rJM,GOOglC



CHAPTER XXIV.
TYPICAL FOUR-CYCLE ENGINES.
Of the two types of marine gasolene engines — two- and
four-cycle — the well known "Buffalo" engines are typical
examples of the latter type. The builders, Buffalo Gaso-
lene Motor Company, of Buffalo, New York, say: "We
have always advocated the four-cycle, believing it to be
the most reliable, durable and economical type — repre-
senting as it does mechanical perfection as against two-
cycle theoretical possibility. Of course the mere fact
that an engine is of the four-cycle type is no guarantee
of its quality — there are black sheep in many good fam-
ilies — but we are speaking of the high grade machines."
The most essential features of any machine, after
original good design and process of building, are proper
provision for lubrication and cooling, and a simple and re-
liable ignition system, and, most of all, a good carbureter.
The cylinders and valve chambers of the Buffalo en-
gine are completely water jacketed, the water jackets
being cast integral with the cylinders. There are large
hand hole plates on side of cylinder, easily removable, so
that the jacket can be cleaned if necessary.
