1. Estimated Time: for the seventh time zone main port (1050 East longitude), is now the official Convention of The Socialist Republic Vietnam (by the international hour plus 7 hours).2. The height of the tides: rounded to title xi metres (0.1 m). The height of the tide is calculated from the standard cartridge "0 chart". This standard cartridge was retrieved from the water level State of the tides (to note, the number "0 Sea Map" of each different region).
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