Acoustic Propagation in a Uniformly Moving Ocean Channel with Depth‐Dependent Sound Speed Available to Purchase

The effects of uniform channel motion on the ray geometry, spreading loss, and travel time of individual arrivals are examined in a channel with horizontal boundaries and a linear depth‐dependent sound speed. The properties of corresponding arrivals are compared for the case of the above channel, the case of a uniformly moving channel with a constant sound speed, the case of a channel with a linear depth‐dependent current and a constant sound speed, and the case of a stationary channel with a linear depth‐dependent sound speed. The total field at a fixed receiving point is considered, and it is shown that the intensity and phase are not independent of a small uniform current. The total field in the BIFI range, a 33‐km×40‐m channel, is calculated under summer and winter conditions. It is found that small changes in the current can produce significant variations in the amplitude and phase of the total field.