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54 THOMPSON'S COAST PILOT. in, the only precaution necessary is to look out for the spit off Tawas Point. This can generally be plainly discerned by the color of the water. The anchorage is good all over the bay, bemg clay and sand, and is well sheltered from all winds excepting south. These bearings are magnetic, and the variation of compass is 2°05' E. From Point aux Barques, with the Lighthouse bearing SW 54 miles, the course to Tawas Harbor is WbyN3N. The dock at Tawas City has 8 and 10 feet water alongside at the outer end. In leaving Tawas: Bay, bound to the northward, run out from the anchorage until:the dock or mills béar WSW, and run out ESH, until the coast to the northward is well open, or at the distance of 14 miles from it; thence NE+E-18 miles, to Point Sauble; thence NSE 50 miles, to Thunder Bay Island Lighthouse. In foggy or dark weather, coming from the northward, run the coast along in 34 to 4 fathoms water, which will lead you into the bay. The spit aid point sets off from the Lighthouse 12 miles, and at the extreme end drops off suddenly, from 4 to 9 and 28 feet water. From the Light- house to dock 8 miles. | : Charity Island Light, -fixed, visible 12 miles--well kept--on Charity Island, at the mouth of Saginaw Bay. -- Saginaw Bay light, fixed, visible 10 miles, at the mouth of Sig- inaw River, Michigan. Port Austin, 14 miles from Point aux Barques, has two piers, with 11 feet water alongside the north one, and 9 feet on the south pier. To run in, bring the chimney of the saw mill to bear S4H, and run for the end of the north pier. In running for Port Austin from Point aux Barques, keep Point aux Barques light open till the chimney bears S$H. These piers are protected by a reef which makes off from the land in a northwesterly direction from the first point east of them. Vessels load alongside the north pier. : Thunder Bay Island Light, fixed, varied by flashes, visible 14 miles. 'This is one of the best kept lights on the lakes, with mo Hog Bell, struck by machinery. Detour light, fixed, visible 14 miles, at the entrance a St, Mary's River, Presqu'ile light, fixed, visible 14 miles, 30 miles NW of Thun- der Bay Island. 'To enter this harbor, bring the Lighthouse to bear