물때 타이드
조수 관측소
Barrow (Ramsden Dock)
Halfway Shoal
Haws Point
Roa Island
해류 관측소
Roa Island, 0.5 mi SSE of
Roa Island, 2.3 mi S of
Roa Island, 5.7 mi SSW of
Roa Island, 5.9 mi S of
Roa Island, 7.7 mi SSW of
