Gravelly Shoal

แลตติจูด/ลองกิจูด: 44.0167° / -83.5333°

ประเภท: Lighthouse

Type of Flashing: Flashing (Fl)

Number of Flashes: 1

Light Color: Red / R

Interval of Flashing: 6s

Focal Height: 23m

Location / Area / Island: Michigan's Eastern Lower Peninsula

Operational: Yes

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