Facts Found:
1) Wind was approximately 10-12 kts, light chop.
2) ARC-22 and Nacra 20 were approaching the starting line on starboard tack.
3) ARC-22 established an overlap from astern and to weather of Nacra 20.
4) Approximately 2 seconds after the start, ARC-22 bore away, striking Nacra 20 with her fixed spinnaker pole just aft of Nacra 20's rear cross beam. The spinnaker pole pierced the hull and the boats were locked together for approximately 30 seconds.
5) ARC-20 sailed over the starting pin while the boats were locked together.
5) Nacra 20 sustained significant damage - a hull tear approximately 3 feet long - that forced her to immediately retire.
6) After the boats separated, ARC-22 continued in the race.

Conclusions:
ARC-22 broke rule 11 (windward boat shall keep clear of a leeward boat)
ARC-22 broke rule 14 (avoid a collision)
ARC-22 did not start properly and broke rule 28.1 (string rule) by sailing over the starting pin.

Decision:
ARC-22 is DSQ. Nacra 20 is entitled to redress under 62.1(b)