1. CALCULATING A REPLACEMENT TIME a/k/a EQUIVALENT ELECTRONIC TIME (EET)

2. What is a “Replacement Time”?
In the case of the failure of the main electronic timing system (System A), the results of the electronic back-up system (System B) will be valid as per the requirements for calculating a correction.
In the case of the failure of both the main and back-up systems Hand (manual) times may be used in the official results after a correction has been calculated.
Copies of Replacement Time (EET) calculations must be submitted with TDTR’s forwarded to assigned U.S. TWG representatives.

3. CALCULATION OF THE CORRECTION
1. Calculate the difference between the times from system B or those taken by hand* and the electronic system A times of the 5 competitors starting before the missing time and the 5 starting after or, if necessary, the 10 nearest competitors. (A Forerunner is not a competitor!)
Divide the sum of the 10 time differences by 10 and round, if required, to give the correction.
Apply the correction to the calculated hand time of the competitor without an electronic time.
*Hand (manual) timekeeping is required for all levels of competition.

4. CALCULATION FORM The following presentation is an aid to help you understand the basics of the calculation.

5. REQUIRED DOCUMENTS:
Electronic Time Recording Form and or Timing Tapes (A and B)
Finish Timekeeper Recording Form
Start Timekeeper Recording Form

6. ELECTRONIC TIME RECORDING FORM

7. FINISH TIMEKEEPER RECORDING FORM

8. START TIMEKEEPER RECORDING FORM

9. Subtracting Electronic Times
TIMES ARE NEVER ROUNDED OR AVERAGED!
HINT: 1 Minute = 60 Seconds Start from the left: Cross a colon – borrow 60; Cross a decimal – borrow 10
4.17
#11 57:55.79 Fn. HT
-57:02.84 St. HT =
Calculated Hand Time
# :24.83 Fn. HT
-56:04.80 St. HT
= 1:20.03
Calculated Hand Time

10. CALCULATED HAND TIMES FOR MISSING TIMES Insert the Finish Hand Time and Start Hand Time from Recording Forms

11. COMPLETE DATA FOR 10 NEAREST

12. DO THE MATH & ADJUST THE TIMES

13. VALUE OF A REPLACEMENT TIME
A Replacement Time that is calculated in accordance with the rules is a valid time!
Accuracy of a hand-calculated replacement time must be verified.
ACR/ICR and

14. ALTERNATIVE CALCULATION METHODS:
Excel spreadsheets
Split Second & Vola
HINTS:
Do NOT use Forerunners’ times
Do NOT use DNF start times
When missed times are in close proximity, both systems allow for calculation of multiple replacement times
Both systems may require a dedicated computer
Electronic timekeeping equipment operator should not be responsible for these calculations
Regardless of the system you prefer, do not wait until race day to learn how to use it!

15. CALCULATION: USING A SPREADSHEET – times in all seconds

16. CALCULATION: USING SPLIT SECOND e. g
CALCULATION: USING SPLIT SECOND e.g. Calculating Missed “A” Time) using “B” times

17. CALCULATION: USING St/Fn ToD
FILL IN HEADER!
Key in:
Bib #’s
Start ToD
Finish ToD
Electronic Times: Automatically entered by software.
(If not working in actual race rile, input Electronic Times manually.)
Print for review
Select “OK” to auto
assign EET in race file
Complete EET & automatically assign replacement time

18. CALCULATION: USING Elapsed Time e. g
CALCULATION: USING Elapsed Time e.g. Calculating “A” (Electronic Time) using “B” or “calculated Hand Time” (Elapsed)
FILL IN HEADER!
Key in:
Bib #
Elapsed Times
EET not complete until Step 3 completed
Print for review
Select “OK”; time auto assigned in race file
3. Select

19. CALCULATION: USING Elapsed Time e. g
CALCULATION: USING Elapsed Time e.g. Calculating “A” (Electronic Time) using “B” or “calculated” Hand Time (Elapsed)
Regardless of process used: “ToD” or “Elapsed” verify the following:
“EET APPLIED”

20. CALCULATION: USING VOLA
Refer to VOLA PPT for updated information

21. COMPUTER-GENERATED REPLACEMENT TIMES Just because a replacement time is calculated by a computer doesn’t mean it is correct. Accuracy of a computer- calculated replacement time must be verified!