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QID - 25478

You are transiting the Straits of Mackinac by way of an improved channel. You have information which indicates that the channel's Federal project depth is 28 ft. Which of the following statements is true with regards to this channel?

The maximum depth which may be expected within the limits of the channel is 28 ft. 
            
The channel has 28 ft. in the center but lesser depths may exist in the remainder of the channel. 
            
The design dredging depth of the channel is 28 ft. 
            
The least depth within the limits of the channel is 28 ft. 
            

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