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Many ships used knots spaced 8 fathoms (48 feet or 14.6 meters) apart, while other ships used the 7-fathom prescription. [8] The time interval needs to be adjusted according to the distance between knots. Substituting 6,000 feet for 1 mile, the above formula yields 28.8 seconds for a distance of 8 fathoms.
At sea level one minute of arc along the equator equals exactly one geographical mile (not to be confused with international mile or statute mile) along the Earth's equator or approximately one nautical mile (1,852 metres; 1.151 miles). [14] A second of arc, one sixtieth of this amount, is roughly 30 metres (98 feet).
However, anchoring of vessels within 1 nautical mile (1.9 km) radius of the South Fairway Buoy is prohibited. On the other hand, The Outer Anchorage North Channel is the recommended anchorage for vessels waiting for pilots about 0.5 nautical miles (0.93 km) before the pilot boarding ground, where the water depths is 15–22 metres (49–72 ft).
Island 0.5 nautical miles (0.93 km; 0.58 mi) long, lying 0.1 nautical miles (0.19 km; 0.12 mi) north of Skua Island in the Argentine Islands, Wilhelm Archipelago. Winter Island was named by the BGLE, 1934-37, which made this island the site of its winter base during 1935. [7]
The 65-foot (19.8 m) fishing vessel – a seiner – sank in 200 feet (61 m) of water less than two minutes after striking an iceberg 0.5 nautical miles (0.93 km) from Glacier Island) outside Columbia Bay, 35 nautical miles (65 km) southwest of Valdez
With this value for R the meridian length of 1 degree of latitude on the sphere is 111.2 km (69.1 statute miles) (60.0 nautical miles). The length of one minute of latitude is 1.853 km (1.151 statute miles) (1.00 nautical miles), while the length of 1 second of latitude is 30.8 m or 101 feet (see nautical mile).
A pond, 0.3 nautical miles (0.56 km; 0.35 mi) long, located 0.5 nautical miles (0.93 km; 0.58 mi) south of the snout of Commonwealth Glacier in Taylor Valley. The pond is part of the Aiken Creek system and receives drainage from several glaciers including Commonwealth Glacier, Wales Glacier and the unnamed glacier next westward.
A prominent gully 0.5 nautical miles (0.93 km; 0.58 mi) west of Margaret Hill on Rücker Ridge. Named by the New Zealand Geographic Board (NZGB) (1994) following work in the area by a NZGS field party, 1977-78. Intense and intricate folds interlock like a jigsaw puzzle in the marble wall forming the eastern side of this gully. [8]