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Wardroom where the headless corpse was found.

Item #: SCP-1977-JP

Object Class: Euclid

Special Containment Procedures: SCP-1977-JP-A is currently contained within the dry dock at Site-████. SCP-1977-JP-A is to be attached with a GPS transmitter to track the identical signal transmitted between April 24 and 30 of each year. Field agents are to search and investigate individuals exposed to SCP-1977-JP based on GPS tracking records and, if necessary, take them in custody. In order to collect death records of exposed individuals, requests for information are to be submitted to the local public authorities for recording in the Database-1977-JP.

Description: SCP-1977-JP is a phenomenon involving hallucinations and anomalous bleeding from sweat glands that occurs in unspecified individuals between April 24 and 30 annually. Various investigations have revealed that the phenomena associated with SCP-1977-JP occur regardless of the affected subject's health condition or surrounding environment.

Individuals affected by SCP-1977-JP (hereafter referred to as the subjects) experiences auditory and visual hallucinations that share similar content. The auditory hallucinations consist of two major components - the subject clearly perceives " extremely loud mechanical noises" and " masculine or feminine laughter"; several subjects have testified that the mechanical noises closely resemble the diesel engines of a marine vessel. The visual hallucinations are characterized by "an obsolete submarine" and "a headless figure standing at its bow"; other testimonies about the submarine led to the discovery of SCP-1977-JP-A, which is described below.

Immediately after experiencing these hallucinations, the subject begins to exudate blood from the sweat glands throughout the body into the epidermis. The symptoms subside within approximately one minute and are not observed to recur thereafter until death. Examination of blood and skin tissue samples taken during the subject's lifetime, as well as the autopsy of their corpse, have not revealed any abnormalities that would cause the corresponding symptoms.

Individuals exposed to SCP-1977-JP cannot survive beyond one year after experiencing it. Since there are only few similarities between the cause and time of death in each case, as well as the subject's own and surrounding circumstances, it is unclear whether there is a causal relationship between the phenomenon caused by SCP-1977-JP and their deaths. The Foundation initially implemented a protection program by isolating the subjects and eliminating their risk of death, which was eventually discontinued after it failed to prevent the deaths of all subjects within one year.

SCP-1977-JP-A is HMS Truncheon, a T-Class submarine formerly belonging to the Royal Navy. As some of the subjects who experienced SCP-1977-JP hallucinations testified that the word "P353" was painted on the sail of the submarine, the Foundation assumed that the vessel in question was HMS Truncheon. Investigations into the relationship between HMS Truncheon and SCP-1977-JP revealed information about the vessel that has not been made publicly available.

The Foundation conducted a search operation on March 25, 1986, and located the sunken HMS Truncheon at ██°██' N, ██°██' W, installing a GPS transmitter to record the sinking site. On April 24 of the same year, a GPS signal identical to that of the installed transmitter was detected at a different location than the sinking site, and an individual experiencing SCP-1977-JP phenomenon was found in the vicinity of the point of transmission. Since subsequent subjects continued to be found in the vicinity of the GPS signal transmission point, the Foundation determined that HMS Truncheon was associated with SCP-1977-JP, and classified her as SCP-1977-JP-A.

Addendum-1977-JP: "Salvage and Examination of SCP-1977-JP-A"
SCP-1977-JP-A was salvaged from the seafloor and examined on August 9, 1989. During the inspection of the vessel, thirty-two corpses, presumed to be crew members, were found. Thirty-one individuals were identified based on documents provided by the British authorities, although a headless corpse wearing an officer's uniform, discovered in the wardroom, has not been identified.

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