The 500 pound World War Two device was picked up during dredging work.
Rolls-Royce Creates 100 Jobs On South Coast
100 jobs are being created by Rolls-Royce at its factory near Chichester.
They'll mostly be in manufacturing, at the site at Goodwood in West Sussex.
In a statement, Rolls-Royce Motor Cars said:
"Rolls-Royce Motor Cars today revealed record sales results for 2013. 3,630 cars were sold globally during the year, which represents the company's fourth consecutive record. The result is announced in the 110th year of the marque.
"Strong sales growth was reported in many regions, with notable results seen in the Middle East (up 17%) and China (up 11%). Several countries recorded strong sales performances, including Germany, Japan and Canada. China and the United States remained the most significant individual markets for Rolls-Royce Motor Cars. Rolls-Royce sold motor cars in more than 40 countries worldwide, expanding into new markets such as Istanbul, Beirut, Lagos, Hanoi, Taichung and Manila.
"As part of the company's focus on long-term sustainable growth, there was significant dealer development during the year. 15 new dealerships opened across the world, taking the total to 120 for the first time in the company's history. Further dealership expansion is planned for 2014.
"The Company also announced a 2014 recruitment programme for 100 new permanent jobs based at the Home of Rolls-Royce at Goodwood, primarily in the manufacturing areas. This is in addition to 100 new jobs announced in July 2013. More than 1300 people are now employed by Rolls-Royce worldwide."
Torsten Müller-Ötvös, Chief Executive Officer, Rolls-Royce Motor Cars, said:
"My aim at the beginning of last year was sustained growth and another sales record. I am delighted to announce our sales for 2013 and to celebrate the 110th anniversary of the marque with an historic record result.
"We have reported a strong year and have maintained our position at the pinnacle of the super-luxury market. Rolls-Royce is a British manufacturing success story, with a dedicated workforce that is second to none."
Business Secretary Vince Cable said:
"Rolls-Royce's impressive sales record and the new jobs they have created shows the strength of this iconic brand and reflects the rising success of the British car industry. Last year, car exports generated over £30 billion for our economy - a rise of around 7%.
"The Government's industrial strategy is giving businesses like Rolls-Royce the confidence to invest - delivering skilled jobs and driving growth."
640 men were killed when the South African troop carrier was hit by a cargo ship in 1917.
The 79-year-old man suffered a serious head injury in the Cranmer Road car park in Winton.
Two Girls Indecently Assaulted Last Sunday
Recently Played Tracks
Now playing: Non-stop hit music
Deposit £10 to get a £40 Welcome Bonus - That's £50 to play bingo, slots and more!*
Over 50 tracks to make you feel-good. New album out now...
Find your local four day weather report here.
What's happening on the roads where you are?
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Find out more about some of the companies advertising on Heart.
Get some great ideas on how to advertise your business on radio, online and on mobile.