The Port of Long Beach claims to be offering the “world’s most generous sustainable vessel financial incentives” for green ships calling at the US west coast port.

Vessels calling at the California port from 1 July could be eligible for up to $9,000 in rebates on every call if they meet certain emissions criteria.

Earlier this month, the port approved changes centred around incorporating the international Environmental Ship Index (ESI) into the port’s green ship incentive programme.