A Study of Forecast Current Data and Observed Data By Coastal Vessels

Abstract

The National Maritime Resea【ch Institute has conducled the research and development on " the environr lental fhendly shipping support system fbr coastal vessels " suppOrted by NEDO using actual cement tanker and RORO ship coopelate with ship ' s owncrs 、 The present study des α ibes a practical methodology on the sh 負 p ' s log speed estimated by analyzing accumulated actual navigadon data of coastal vessels ． The estimated values are checked by the relative veiocity with respecuo water derived from propeller analysis using measured

Assimilation of the seabird and ship drift data in the north-eastern sea of Japan into an operational ocean nowcast/forecast system

“…Ship drift data every 10 minutes were obtained from 12 cargo ships of coastal service companies by subtracting the ship speed through water measured by the ship speed meter from the ship speed over ground calculated using the GPS log and correcting systematic errors involved in the speed meter 6 . Hourly mean data were obtained within a target region (38°−44° N, 140°−149° E) during a period from 27 December 2013 to 30 October 2014.…”

“…A Japanese marine technologist group has recently developed a shipping support system for coastal vessels utilizing environmental data including ocean current forecast for effective ship operation 5 . They have also developed a monitoring system of the ship drift (ship-logging) around the Japan coastal ocean 6 . We examine feasibility of skill improvement in the ocean current product by assimilating the ship drift data into the model.…”