Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.1): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

June. LEAVE STRAIT LE MAIRE — TIDES. 455 moon. It was high water at a quarter past four, and the tide rose seven feet. " 7th. We unmoored, weighed, stood to the eastward and anchored with the stream anchor, and a large hawser, in fifty fathoms water, about three miles from Success Bay. After taking the required angles and bearings we weighed at eleven, and stood towards Cape San Diego with the first of the flood. Tlie tide being strong, we made rapid progress, and were soon out of the strait ; but wishing to see as much of the N.E. coast as possible, in our progress northward, we hauled to the wind and kept near the land during the night, as the weather was fine and settled. " Before leaving Good Success Bay and the Strait of Le Maire, I felt satisfied that we had acquainted ourselves with the tides, which are as regular and as little to be dreaded as in any part of the world where they run with strength. They will materially assist any vessel in her passage through the strait ; which is very wide, perfectly free from obstacles of any kind, and has Good Success Bay close at hand, in case wind or tide should fail. When the tide opposes the wind and swell, there is always a heavy, and, for small vessels, dangerous 'race' oflF Cape San Diego, where the water is more shoal than else- where {k), we found it so at a neap flood- tide, but let it be remembered that on another day, at the top of the springs, being the day after full moon, we passed the same spot, at half flood, with the water perfectly smooth, and although strong eddies were seen in every direction, the vessel's steerage was but little affected by them. It is high water in Success Bay soon after four in the afternoon, on the full and change days, and low water exactly at ten in the morning. The flood tide-stream begins to make to the northward about an hour after low water, and the ebb, to the southward, about the same time after high water. The tides rise from six to eight feet, perpendicularly. At Cape Pillar the turn of tide, with high water, is at noon : but along the S. W. and S.E. coast the time {k) Five fathoms only were found in one spot during the Beagle's last voyage. — R, F.