About SUB71
SUB 71 is a specialist advisory, brokerage and services organisation focused exclusively on the manned submersible sector.
From first-time buyers to seasoned operators, SUB71 offers a myriad of services — including submersible business plans, selecting the right submersible to (re)sale, management and expert build support.
Founded by Erik Hasselman, who spent over 18 years with manned submersible pioneer U-Boat Worx, SUB71 is built on operational experience, business intelligence, an extensive industry network, and deep technical know-how in the field of private, professional and tourist submarines.
We offer tailored guidance to both current and prospective operators, covering everything from feasibility studies and site surveys to safety assessments, harbour- and seatrial programmes, training standards, fleet planning, qualified supplier, and market research.
When looking to buy a submersible, SUB71 is here to assist with selecting the best submersible to match your needs, and guide you through the technical integration steps, as well as the survey, contract, build and delivery phases with expert oversight.
SUB71 provides end-to-end management for submersible owners – including technical management, insurance coordination, crewing, project oversight, accounting, as well as flag state registration and classification compliance.
Check out our exclusive listings of pre-approved manned submersibles.
Named for the 71% of our planet covered by water, we exist to help owners and operators of manned submersibles.
Submersible Owners (current or future)
Owner Representatives
Submarine Managers and Operators
Shipyards, Naval Architects, Designers, Engineers
Subsea Component Suppliers
Manned Submersible Services Providers
- World's most current and comprehensive listings of submersibles for sale and charter
- Independent industry-experienced advisory
- 360-degree understanding of regulatory, technical, operational, and financial factors
- Dedicated to advancing a safe, sustainable, and innovative future for the submersible industry.