Random House Unabridged Dictionary, © Random House, Inc. 2006.
Usage note Both dived and dove are standard as the past tense of dive. Dived, historically the older form, is somewhat more common in edited writing, but dove occurs there so frequently that it also must be considered standard: The rescuer dove into 20 feet of icy water. Dove is an Americanism that probably developed by analogy with alternations like drive, drove and ride, rode. It is the more common form in speech in the northern United States and in Canada, and its use seems to be spreading. The past participle of dive is always dived.
Usage note Both dived and dove are standard as the past tense of dive. Dived, historically the older form, is somewhat more common in edited writing, but dove occurs there so frequently that it also must be considered standard: The rescuer dove into 20 feet of icy water. Dove is an Americanism that probably developed by analogy with alternations like drive, drove and ride, rode. It is the more common form in speech in the northern United States and in Canada, and its use seems to be spreading. The past participle of dive is always dived.