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Navigational instructions for the northern Tokyo Bay sea areasAugust 1, 2010Tokyo Civil Aviation Bureau3rd Regional Coast Guard HeadquartersWith the release of Tokyo International Airport Runway D, th....

Navigational instructions for the northern Tokyo Bay sea areasAugust 1, 2010Tokyo Civil Aviation Bureau3rd Regional Coast Guard HeadquartersWith the release of Tokyo International Airport Runway D, the following navigationalinstructions are provided for vessels sailing in the sea areas around Tokyo InternationalAirport Runway D and along Tokyo Bay Aqua-Line in order to secure the safety of aircraftsand vessels.1. Definitions of terms(1) ”Vessel highest point”: The top point of the highest object on a vessel.(2) ”Vessel height reference plane”: Among the ‘restricted surfaces’ fixed under the CivilAeronautics Act, ‘approach surface (slope of 2.0%)’ adoptedthe theory of ‘Obstacle assessment surface (OAS) (slope of2.85%)’Slope at the standard surface: 2.85%Standard surface area: The same as the approach area or thearea projecting the approach surface)(3) “Aqua-Line East Fairway”: The sea area decided by "Notification concerning the routespecification" based on the regulation of Article 25, Clause 2 of theAct on Maritime Traffic Safety.2. Sea area around “Off Tokyo Light Beacon”(1) When navigating the sea area within a radius of 1,850m from “Off Tokyo Light Beacon(35°32’ 30”N, 139°51’ 24”E),” vessels should keep seeing the beacon on the port side.(2) Vessels should not anchor in the sea area within a radius of 1,850m from “Off TokyoLight Beacon.”3. Sea area around the Tokyo International Airport Runway D(1) Vessels whose height above the sea level (height from the sea surface to the highestpoint of the vessel) is 28.4m or over should not enter the sea area within the lineconnecting the following 4 points in the sea area under the vessel height referenceplane on the Tokyo International Airport Runway D:Point A: Tokyo International Airport Runway D East Light Beacon(35°32’ 41”N, 139°49’ 51”E)Point B: Tokyo West Fairway 1st Light Beacon(35°32’ 59”N, 139°50’ 19”E)Point C: (35°33’ 15”N, 139°49’ 53”E)Point D: (35°32’ 53”N, 139°49’ 35”E)(2) When sailing the sea area within the lines connecting the 4 points above, vessels whose