The ERDI Tender Technician course is the advanced level of tender training, certifying you as a fully proficient tender on complex public safety operations. You will refine line and umbilical management, communications, emergency response, and coordination, and take on a lead tending role within the team.

It is intended for experienced tenders who want to reach the highest proficiency level.

Why train with Sink or Swim Scuba

You’ll train with an instructor who spent years as a working public safety diver and still supports local dive teams today. As an authorized Interspiro distributor, we keep rental and demo equipment on hand and offer on-site demo dives, so your team can try gear before investing — and we can assist with your dive operations as you build capability. ERDI training runs across three levels — Awareness, Operations, and Technician — and we train public safety divers locally, nationally, and internationally, including teams as far away as Spain.

Explore the pathway: Training Pathway · Public Safety Diving hub · ERDI I Public Safety Diver