Tidal Range: Mean 18.1 feet; Large 25.2 feet

CAMPOBELLO ISLAND, Deer Island, and a chain of smaller islands overlap to guard the entrances of Passamaquoddy Bay, tucked away to the north. Campobello also protects the struggling industrial towns of Eastport and Lubec, which flank the entrance to the wild and empty waters of Cobscook Bay.
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As the enormous Bay of Fundy tides pour through these complex passages, they form strong and turbulent currents, which, together with the frequent fogs, make navigation difficult in the area. The three major approaches to Passamaquoddy Bay are Lubec Narrows, Head Harbour Passage, and Letete Passage—each with very strong currents. Head Harbour Passage is the main channel and by far the easiest.
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U.S. chart 13396 is particularly useful in this area. Based on Canadian data, its soundings are in meters, and it includes details such as the location of fish weirs.
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Lubec Narrows. The International Bridge joining Lubec and Campobello Island over Lubec Narrows is fixed and has a vertical clearance of only 47 feet (at high tide). This passage should be used by strangers only at high slack, if they can pass comfortably under the bridge. Currents at maximum strength run 7 or 8 knots with substantial eddies and turbulence, and there is danger of colliding with one of the bridge piers. At low tide the approach channel is narrow and crooked. It’s far better and safer to make the longer trip around Campobello Island and through Head Harbour Passage. For sailing directions for Lubec Narrows, see Lubec approaches.
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Head Harbour Passage. Head Harbour Passage runs between Campobello and Deer Island toward Eastport and Lubec. It is several hundred yards wide and clear of obstructions. Although you may encounter tide rips and boils, the passage is basically safe and easy.
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Letete Passage. Letete Passage cuts north of Deer and McMaster Island and is the most direct route to St. Andrews. It is wide and full of obstructions, and the current can rip along at 8 knots, with strong eddies and boils. It is well-marked, though, and in good visibility near high or low slack it is easy. Passing with the flood is like having an extra engine. Unless you know it well, avoid Letete Passage in poor visibility.

Western Passage. From Eastport, the usual approach to St. Andrews and Passamaquoddy Bay is through Western Passage. Time your passage to avoid the worst currents. Near slack water, Western Passage is usually calm and benign. But the full force of the flood of the ebb can bring to life "Old Sow," one of the world's largest whirlpools!
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