Location:

To reach the tidal bench marks via boat from Sitka, Alaska, turn left after the Sitka Breakwater. Proceed until passing Batterly Island by about 0.46 km (0.25 nm). Then come left to a course of about 197 T (171° magnetic). Continue on course for about 18.5 km (10 nm) until Peisar Island is abeam to port. Then change course as needed to transit Biorka Channel located between Biorka Island ad Ataku Island. Ease left around Necker Islands passing Golovni, and Urilof Islands. Continue left until John Rock is abeam to port. The southern edge of Golf Island bears about 078 T (052° magnetic) at a range of 4.6 km (2.5 nm) from the southern edge of John Rock. The bench marks are located in a small cove SE of the Jackknife Islands on the western side of Golf Island, Alaska, at approximately 56° 47' 10.46" N, 135° 23' 40.29" W. The tide gauge was installed on the beach.