
Heim Maritim has completed a focused modification program on SalMar’s wellboat Selma. Each upgrade was carried out with two goals in mind: meeting operational needs today and aligning with stricter requirements for fish welfare, safety, and sustainable vessel use.
Updates Carried Out and Their Purpose
- Delousing system modifications (midship and bow): Adjusted to handle greater flow and flexibility, supporting more consistent treatment performance in lice management.
- Bow-mounted A-frame for fish hose operations: A permanent structure was added to reduce manual handling risks and improve crew safety, creating smoother and safer fish transfers.
- New filtering pump in aft water reservoir: Installed to provide stable water quality during treatments. Reliable filtration reduces operational risk and improves treatment outcomes.
- New diesel generator in aft engine room: Installed with auxiliaries to meet the higher electrical load of modern systems, giving Selma stronger energy resilience.
- Purpose-built O₂ tank room on main deck: Replaced the containerized arrangement with a permanent protected room, improving safety and ensuring a reliable oxygen supply for fish handling.
- Relocation of air compressor and storage tank: Moved to the hydrolizer room to improve layout and free up space. A new service hatch and air outlet louver were built to ensure safe access and ventilation.
- Ventilation louver on funnel: Installed to improve airflow and maintain correct operating conditions after the system changes.
- Adjusted communication system on main deck: Reconfigured to align with the modified delousing system arrangement and secure uninterrupted operations.
- Conversion of lice tank to enclosed ballast space: Repurposing the tank strengthened vessel stability and maximized use of existing structures.

A Wellboat Built for Today’s Standards and Tomorrow’s Goals
With these modifications, Selma is better prepared to operate under stricter lice management practices, higher fish welfare expectations, and sustainability goals. Heim Maritim’s work shows how targeted upgrades extend vessel life, improve safety, and support environmentally responsible operations without the footprint of new construction. Drone footage of the bow A-frame installation