<P> Burial at sea is the disposal of human remains in the ocean, normally from a ship or boat . It is regularly performed by navies, and is done by private citizens in many countries . </P> <P> Burial - at - sea services are available at many different locations and with many different customs, either by ship or by aircraft . Usually, either the captain (or commanding officer) of the ship or aircraft or a religious representative (of the decedent's religion or the state religion) performs the ceremony . </P> <P> The ceremony may include burial in a casket, burial sewn in sailcloth, burial in an urn, or scattering of the cremated remains by ship . Burial at sea by aircraft is usually done only with cremated remains . Other types of burial at sea include the mixing of the ashes with concrete and dropping the concrete block to form an artificial reef such as the Atlantis Reef . </P> <P> Below is a list of religions that allow burial at sea, with some details of the burial . However, beliefs and views may differ within the same religion . </P>

What happens when someone dies on a submarine