Should the buoy on Southampton rock be removed, the east end of Centre island on with the west end of Buisako, will clear the rock to the westward.
Off the village of Susaki, and distant one third of a mile from the shore, is a ledge of rocks, upon which the surf is always breaking; give them a berth of two cables in passing.
Approaching from the eastward, the harbor will not open until you get well inside of Cape Diamond.
To the northward of Cape Diamond is the bay of Sirahama, which is quite deep, and as it has also several sand-beaches, it may be mistaken for Simoda; but as you approach this bay, Cape Diamond will shut in the Ukona rocks, and Rock island to the southward; while in the Simoda roads they are visible from all points.
| Cape Idzu, | latitude | 34° 36′ 03″ N. |
| ” | longitude | 138° 52′ 32″ E. |
| Rock Island, | latitude | 34° 34′ 20″ N. |
| ” | longitude | 138° 57′ 10″ E. |
S. W. ½ W. from Kozu-Sima, distant about 20 miles, and south, a little westerly, from Cape Idzu, distant about 40 miles, there are two patches of dangerous rocks, 15 or 20 feet high, which have been named Redfield rocks. They are in—Latitude 33° 56′ 13″ N., Longitude 138° 48′ 31″ E.; and Latitude 33° 57′ 31″ N., Longitude 138° 49′ 13″ E.
These positions may not be strictly correct, but it is believed they are not much out of the way.
Several errors in the first edition of these directions, published in July last, have been corrected in the above.—W. L. M.