In the entrance to Chesterfield Inlet, S of Promise Island, there are charted depths of 36.6 to 91m. A depth of 29m can be maintained along the recommended route as far W as Cross Bay (63°54'N., 93°30'W.), and 20m from there to Chesterfield Narrows, where a rock shelf with depths of 2.1 to 3m obstructs the channel. Vessels with drafts of up to 4.6m have sailed up Chesterfield Inlet and crossed Baker Lake. The track usually followed through Chesterfield Narrows leads over a least charted depth of 4.9m.

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