Moving a session has to be quick. A flat morning means contacting twelve people, offering a new slot and keeping the money in the business — done by hand it takes an hour that nobody has at seven in the morning.
Waivers and health declarations are non-negotiable and always the bottleneck. Signed digitally at booking, they stop the queue on the sand of people filling in forms while the tide does its own thing.
Kit is inventory that moves. Which wetsuit sizes are out, which boards are with which group and what came back damaged is the difference between a full session and turning somebody away.
Seasonal staffing turns on the forecast. A rota built for a busy Saturday and a cancelled Sunday needs adjusting fast, and instructors paid by the session want to know by the evening before.