Chart 6 CHART OF TIMING EQUIPMENT CLASSIFICATION
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
G / A D / A Vehicular acuated apparatus incorporating print-out. Issue times to 0.01 sec
D Vehicular actuated digital display. Issue times to 0.01 sec
E / A Vehicular actuated apparatus incorporating print-out. Issue times to 0.01 sec
E / A( 10) Vehicular actuated apparatus incorporating print-out. Issue times to 0.01 sec
E / A( 10 K) Transponder actuated apparatus. Issue times to 0.01 sec
E Vehicular actuated digital display. Issue times to 0.01 sec
E / B *
Apparatus with multi-memory split and digital display. Issue times to 0.1 sec
E / C Apparatus with split time function. Issue times to 0.1 sec
Race / Karting
Any event
International speed events All except FIA events
All below National
Race / Short circuit Karting National speed events
National events
Clubman speed events
F Vehicular actuated apparatus. Issue times to 0.1 sec Clubman speed events ASN R Time of day with split. Issue times to 1 sec Rally timing ASN R( O / I) Time of day with split. Issue times to 0.1 sec Rally timing ASN
National observatory or NAMAS certified laboratory As G / A
As G / A
ASN
ASN
ASN
ASN
ASN
ASN
* Some class 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.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 5 Part A Appendix 18- Charts 192