- Subhub is recoverable to the surface by pumping out the seawater ballast tanks.
- Maintenance is performed at the surface and can be conducted over extended periods of the tidal cycle.
- It is expected that maintenance will be unrestricted on the neap tidal cycle when the tidal flows are at there slowest.
- Pressure hulls are located in the top portions of the Subhub hull on both the port and starboard sides.
- Access hatches into the pressure hulls allow quick maintenance operations to be carried out at the surface.
- Decommissioning is simple and conducted in a similar manner to maintenance but includes reeling in the mooring lines to leave the site with hardly a trace that Subhub was there.
Mooring analysis of Subhub in the maintenance consition (ANSYS AQWA)