British Admiralty Nautical Chart 3379: Shanhaiguan Ship Building A red equilateral triangle is

A red equilateral triangle is based against the hoist

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British Admiralty Nautical Chart 3379: Shanhaiguan Ship Building A red equilateral triangle isBritish Admiralty Nautical Chart 3379: Shanhaiguan is a standard nautical chart. This nautical chart complies with Safety of Life at Sea (SOLAS) regulations and is ideal for professional, commercial and recreational use. Charts within the series consist of a range of scales, useful for passage planning, ocean crossings, coastal navigation and entering port. Mariners should always use the largest scale nautical chart appropriate to their needs. In