Timing Equipment

The 2003 MSA Officials Yearbook advises :

5.1 It is mandatory for all timing equipment used to establish and publish times at MSA permit events to be of a type which has a current MSA Certificate of Approval foe Use, and to be tested and certified in accordance with 5.2

5.2 Timing equipment is classified as follows :

Equipment Class	Description	Suitable for	Certifying Laboratory
G/A	Vehicular actuated apparatus incorporating print-out. Issue times to 0.001 sec.	Race only	National observatory or NAMAS certified laboratory
G/A & E/A	Vehicular actuated apparatus incorporating print-out. Issue times to 0.01 sec.	Any event	as G/A
D	Vehicular actuated digital display. Issue times to 0.01 sec.	International speed events	as G/A
E/A	Vehicular actuated apparatus incorporating print-out. Issue times to 0.01 sec.	All except FIA events	MSA
E/A (10)	Vehicular actuated apparatus incorporating print-out. Issue times to 0.01 sec.	National 'A' Speed events	MSA
E	Vehicular actuated digital display. Issue times to 0.01 sec.	National 'A' Speed events	MSA
E/B *	Apparatus with multi-memory split and digital display. Issue times to 0.1 sec.	National 'A' events	MSA
E/C	Apparatus with split time function. Issue times to 0.1 sec.	Clubman Speed events	MSA
F	Vehicular actuated display. Issue times to 0.1 sec.	Clubman speed events	MSA
R	Time of day with split. Issue times to 1 sec.	Rally Timing	MSA
R (O/I)	Time of day with split. Issue times to 0.01 sec.	Rally Timing	MSA

* Some classes E/B timers incorporate facilities to ensure that only those times coincident with the start of vehicle actuation are recorded to 0.01 sec. These may be used in conjunction with a class E/A printing clock to produce short interval times to 0.01 sec accuracy (Latching System). The time interval is not to exceed 5 mins and in the event of any difference or dispute the E/A time is to be issued as the true time.

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