I just wanted to clear up something and ask if other clubs allowed launching a boat after the race started. Our club has never allowed a boat in after the start of the race unless it was a small race and no one objected. For sure the final call belongs to the pit boss see IMPBA rule ". Clock Time
1. Clock Time will be initiated at the expiration of Pit Time and no boats may
be launched or released after commencement of Clock Time. In the interest
of safety, if a boat is started before pit time has expired, it shall be allowed
to be launched at the discretion of the Pit Manager. "
Clock time is the last 30 seconds BEFORE the start of the race. From the IMPBA rulebook-
b. Clock Time
1. Clock Time will be initiated at the expiration of Pit Time and no boats may
be launched or released after commencement of Clock Time. In the interest
of safety, if a boat is started before pit time has expired, it shall be allowed
to be launched at the discretion of the Pit Manager.
2. Milling procedures during Pit Time and Clock Time.
a. Boats on the course awaiting the expiration of Clock Time will adopt a
milling pattern in a clockwise direction around the course. In the
interest of safety, course milling is required.
3. During the last fifteen seconds of Clock Time, boats passing the No. 6 buoy
must steer a straight course, and observe driver safety in selecting lanes.
Zigzagging, "S" turns, or fishtailing to delay crossing the start line will draw
an infraction with either a one lap penalty or possible disqualification being
assessed.
c. Start
1. The expiration of Clock Time signifies the start of the heat, regardless of the
position of the entrants, and also starts the time of the heat.
2. Boats crossing the start line prior to the expiration of Clock Time will be
ruled as jumping the gun and will be required to complete an extra legal lap,
i.e. complete a circuit of the course and re-cross the start line for a legal start.
3. A heat may be considered officially started when one boat legally crosses the
start line at the termination of Clock Time.