One factor hindering expansion of shore-side power is the difference in the electrical frequencies of ships.
Frequency of ship visits This criterion can be a good indicator of a port's attractiveness, as it increases the hub port connectivity in maritime networks.
From the perspective of shipping lines, Lirn and Beynon (2006) determine the port selection criteria for Nigerian ports, emphasizing efficiency, frequency of ship visits, adequate infrastructure, and quick responses to port users' needs as significant criteria.
The port selection criteria of shippers are determined by Chinonye et al. (2006) for Nigerian ports, and efficiency, frequency of ship visits, and adequate infrastructure are found to be significant.
Singapore has significantly high performances for criteria in the port traffic category, specifically, "frequency of ship visits" and "number of services calling at port," as reflected by its almost 18,000 vessel arrivals in 2016 and its connections in maritime networks with 600 ports globally.
In the marine realm, this so called 'propagule pressure' may change with the frequency of ship arrival [22].
The South Carolina Ports Authority wants to build a new ship terminal that port officials say will handle only one ship at a time, but the frequency of ships could increase.
Despite a lack of hard evidence to conclude that the cap has been breached, since September 2018, the UN has obtained evidence of the increasing frequency of ship-to-ship transfers and of one unprecedented prohibited petroleum product transfer comprising 57,623.491 barrels alone, worth $5,730,886.
Furthermore, the natural frequencies of the ship's hull change slightly, depending on the conditions on the sea-ice around the vessel.
Are whales lowering the pitch of their communications in order to get below the frequency range of shipping?
