A system for imaging an underwater environment of a body of water, the system comprising: a transducer assembly (102a, 102b, 102c) comprising: at least one transmit transducer configured to transmit sonar signals into the underwater environment, wherein the at least one transmit transducer comprises an array of a plurality of transmit transducer elements electrically connected in series, wherein each of the plurality of transmit transducer elements comprises an emitting face, wherein at least two of the plurality of transmit transducer elements (209a, 209b) are mounted with respect to each other such that respective emitting faces (212a, 212b) of the at least two of the plurality of transmit transducer elements are oriented in different directions (211a, 211b); an array of a plurality of receive transducer elements, wherein the array of the plurality of receive transducer elements defines a length and a width with a ratio of the length to the width being at least 3:1, wherein each of the plurality of receive transducer elements is configured to receive sonar returns from the sonar signals and form corresponding sonar return data; and a sonar signal processor configured to: receive the sonar return data from each of the plurality of receive transducer elements of the array; sum the sonar return data from all of the plurality of receive transducer elements to form summed sonar return data; and generate sonar image data based on the summed sonar return data, wherein the sonar image data forms a sonar image representing the underwater environment; and a marine electronic device comprising: a user interface comprising a display; a marine electronic device processor; and a memory including computer program code configured to, with the marine electronic device processor, cause the marine electronic device to: receive the sonar image data from the sonar signal processor; and cause presentation of the sonar image, based on the sonar image data, wherein the transducer assembly is configured to be mounted to a watercraft such that the array of the plurality of receive transducer elements is oriented downwardly, with the length extending in a first direction that runs generally parallel with a centerline of the watercraft and the width extending in a second direction running from a port side of the watercraft to a starboard side of the watercraft. at least one transmit transducer configured to transmit sonar signals into the underwater environment, wherein the at least one transmit transducer comprises an array of a plurality of transmit transducer elements electrically connected in series, wherein each of the plurality of transmit transducer elements comprises an emitting face, wherein at least two of the plurality of transmit transducer elements (209a, 209b) are mounted with respect to each other such that respective emitting faces (212a, 212b) of the at least two of the plurality of transmit transducer elements are oriented in different directions (211a, 211b); an array of a plurality of receive transducer elements, wherein the array of the plurality of receive transducer elements defines a length and a width with a ratio of the length to the width being at least 3:1, wherein each of the plurality of receive transducer elements is configured to receive sonar returns from the sonar signals and form corresponding sonar return data; and a sonar signal processor configured to: receive the sonar return data from each of the plurality of receive transducer elements of the array; sum the sonar return data from all of the plurality of receive transducer elements to form summed sonar return data; and generate sonar image data based on the summed sonar return data, wherein the sonar image data forms a sonar image representing the underwater environment; and receive the sonar return data from each of the plurality of receive transducer elements of the array; sum the sonar return data from all of the plurality of receive transducer elements to form summed sonar return data; and generate sonar image data based on the summed sonar return data, wherein the sonar image data forms a sonar image representing the underwater environment; and a marine electronic device comprising: a user interface comprising a display; a marine electronic device processor; and a memory including computer program code configured to, with the marine electronic device processor, cause the marine electronic device to: receive the sonar image data from the sonar signal processor; and cause presentation of the sonar image, based on the sonar image data, a user interface comprising a display; a marine electronic device processor; and a memory including computer program code configured to, with the marine electronic device processor, cause the marine electronic device to: receive the sonar image data from the sonar signal processor; and cause presentation of the sonar image, based on the sonar image data, receive the sonar image data from the sonar signal processor; and cause presentation of the sonar image, based on the sonar image data, wherein the transducer assembly is configured to be mounted to a watercraft such that the array of the plurality of receive transducer elements is oriented downwardly, with the length extending in a first direction that runs generally parallel with a centerline of the watercraft and the width extending in a second direction running from a port side of the watercraft to a starboard side of the watercraft.