Breitling BENTLEY SUPERSPORTS Manual Del Usario página 19

Rule of three: both scales enable one to perform a multiplica -
tion and then a division in just one operation. For example,
to determine the price of 6 meters of cable, if 1.5 meters costs
£ 9, one places the number 9 opposite the figure 6. The result
is shown opposite the figure 1.5; in this case £ 36.
Hourly production or consumption rate: measuring a produc -
tion rate or an hourly consumption rate follows the same
principle as the measurement of an average speed. For
example, if a machine produces 15 units in 45 seconds,
what is its hourly production?
Solution: place the figure 15 (the quantity produced) on
the SECONDS mark on the fixed scale, then read off the
result opposite figure 45 (interval measured); in this case
1,200 units per hour.
Pulsometer: the pulsometer enables fast calculation of pulse
rate. For example, if 27 beats are measured over a 24-second
period, one need only place the figure 27 (number of heart -
beats) opposite the MINUTES marker, and then read off the
result opposite figure 24 (length of observation); in this case
67 beats per minute.
32
SUN COMPASS
Your B chronometer may be used as a sun compass, thus enabling
REITLING
you to determine the Northerly-Southerly direction. For regions that have
instated daylight saving time, subtract one hour when directing the watch.
In the Northern hemisphere
Point the hour hand precisely towards the sun. In relation
to the watch dial, the point located midway between
the current time and 12 o'clock indicates the South, the
North being exactly opposite.
In the Southern hemisphere
Point the hour-marker located at 12 o'clock on the dial
precisely towards the sun. In relation to the watch dial,
the point located midway between the current time and
12 o'clock indicates the North, the South being exactly
opposite.
N
33
S