This is a 1923 Japanese hydrographic chart with English-Japanese text. The chart shows the soundings in fathoms of the Singapore Straits, a crucial piece of information for ships navigating the waterway between Singapore and the Riau islands.
This is a 1923 Japanese hydrographic chart with English-Japanese text. The chart shows the soundings in fathoms of the Singapore Straits, a crucial piece of information for ships navigating the waterway between Singapore and the Riau islands.