1. Using the Stop Watch & Scientific Calculator
To record the Elapsed time
and
To find the corrected time in a
PORTSMOUTH YARDSTICK
Yacht Race

2. 14:1636 The Stop Watch Used to find the Elapsed time . H M S C
PRESS THE CLOCK BUTTON
DUAL-TIMER
CLOCK
14:1636 T1 T2 H M S C
START
STOP
CLEAR
SHOWS THE TIME OF DAY

3. 00:1636 The Stop Watch Two Timers T1 and T2 H M S C
PRESS one of timer buttons T1 or T2
DUAL-TIMER
CLOCK
00:1636 T1 T1 T2 H M S C
START
STOP
CLEAR
Shows the timer. If running press stop

4. Setting up the timer to count down
Clear the timer display
PRESS the C (CLEAR) Button
Display shows ZERO
Set up 5 minute count down to start
Tap the M (Minute) Button 5 times
DUAL-TIMER
CLOCK
00:0000
00:1636
00:1636
00:1636
00:0100
00:0300
00:0200 T1 T1
00:0400
00:0500 T2 H M S C
START
STOP
CLEAR
YOU ARE NOW READY TO CLICK THE START BUTTON ON FIRST SIGNAL

5. PRESS THE START BUTTON WITH FIRST HORN
The count down will start
Next Horn when display shows 4 minutes
Next Horn when display shows 1 minute
The race starts with the horn when display is zero
The clock continues to show the elapsed time which you will record
As each boat crosses the finish.
DUAL-TIMER
CLOCK
00:0500
01:2345
00:0100
00:0400 T1 T1
00:0000 T2 H M S C
START
STOP
CLEAR
Elapsed time for each boat recorded as Hours:Minute:Seconds

6. THERE IS NO NEED TO REMEMBER THIS ALL WILL BE MADE SIMPLE
Corrected Time =
Elapsed time Divided by PY x 1000
However it simpler to divide ET by a decimal version of the PY
Eg. PY 965 use ·965
Or PY 1168 use 1·168
RYYC PY list will be in decimal format
THERE IS NO NEED TO REMEMBER THIS ALL WILL BE MADE SIMPLE

7. 1°11°42.23 THE CORRECTED TIME IS 1 hour 11 mins 42.23 secs
Let me introduce the
HOUR MINUTE SECOND button
HMS for short
This is used to enter the times in hours minutes and seconds
1 hour 23 mins 45 secs 1º
23°
45°
÷ 1.168
1°11°42.23
Enter 1 and our HMS Button
This puts a ° after the one
Now enter the 23 mins and HMS
And then 45 seconds and HMS
1 hour 23 mins 45 secs 1°23°45º
We can now do the arithmetic
To correct this time for a boat PY ÷ and press =
THE CORRECTED TIME IS
1 hour 11 mins secs
Recorded as
1 hour 11 mins 42 secs