Size of ship should be able to fit into many shipyards and slipways so that they can be easily maintained, repaired and replenished in existing infrastructure.
The slipway above is in Western Australia and belongs to Austal who make commercial and military catamarans and trimarans - leading company.
The catamarans shown are around 50m long and are left as a comparison. My ship is inserted in as 120m long. It fits comfortably and can be workshopped in the portal frame buildings :)
