A two-pound naval cannon viewed from the top. The letters "VOC" are the monogram of the "Vereenigde Oost-Indische Compagnie"(Dutch East India Company) and the letter "A" represents "Amsterdam". This cannon, now at the Castle of Good Hope in Cape Town, South Africa lay in 300 fathoms (550 metres) of water, 29 miles (about 50 km)The notice alongside the cannon did not specify "nautical" or "imperial" miles. south-west of the Cape of Good Hope for over 200 years before being recovered in 1961.