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To honor Lt. Holbrook the town's namesake, the Holbrook council acquired a portion of the hull of HMAS Otway, a decommissioned Oberon class submarine when it was decommissioned by the Royal Australian Navy in 1995. The Navy gifted the fin from the submarine to the town. This resulted in a drive by the town and district to bid on the whole submarine. This drive for the purchase of the submarine, was successful in raising $100,000, almost all a gift from Lt Holbrook's widow Gundula Holbrook. However, this amount was insufficient to purchase all of the Otway. Through negotiations with the scrap yard in Sydney, the town did succeed in purchasing all of the outside skin of the Otway above the waterline. This part of the Otway is now displayed in Germanton Park in the heart of Holbrook, having been dedicated on 7–8 June 1997.