MT Vector was a small motor tanker, built in Manila, Philippines in 1980 as Oil Nic-II, with a tonnage of 629 grt and length of. The tanker was designed to transport petroleum products such as gasoline, kerosene and diesel. Prior to December 1987 the tanker was acquired by Vector Shipping Inc, owned by Francisco Soriano of Manila.
On 19 December 1987 at about 8:00 p.m., Vector left Limay, Bataanen route to Masbate with a crew of 13, and loaded with 8,800 barrels of petroleum products shipped by the ship's charterer, Caltex Philippines, now Chevron. The following morning, at about 6:30 a.m., the passenger and cargo ferry Doña Paz left the port of Tacloban headed for Manila with a complement of 59 crew members, including the master and his officers, and passengers totaling 1,493 as indicated in the Coast Guard Clearance, though estimated to be over 4,000. Doña Paz was a passenger and cargo vesselowned and operated by Sulpicio Lines, plying the route of Manila/Tacloban/Catbalogan/Manila/Catbalogan/Tacloban/Manila. At about 10:30 p.m. on 20 December 1987, the two vessels collided in the open sea in the vicinity of Dumali Point in Tablas Strait between Marinduque and Oriental Mindoro. As the two vessels collided, Vector's cargo ignited and caused a fire that spilled into the water and rapidly spread to Doña Paz, which sank within hours. Vector also sank shortly afterwards. Two of the 13 crew members aboard Vector survived but all 58 crew of Doña Paz died. The official death toll on the ferry is 1,565, although some reports claim that the ferry was overcrowded and that the true death toll is over 4,000. The ships would put the death toll at 4,375 although admitting that only 1,568 were on the manifest. The 21 survivors from the ferry had to swim, as there was no time to launch lifeboats. They were rescued from the burning waters by vessels that responded to distress calls. The two survivors from Vector's crew said that they were sleeping at the time of the incident.
Judgment
Vector Shipping was found liable for the crash, while the chartering company, Caltex, was absolved of responsibility. In a judgement on 24 July 2008, The Supreme Court of the Philippines absolved Caltex Philippines from any liability in the collision between Doña Paz and Vector. The decision affirmed the Court of Appeals' ruling against Vector Shipping and its owner Francisco Soriano. Vector was ordered to reimburse and indemnify Sulpicio Lines Php 800,000.00. This was the total amount due the Macasa family whose kin were among the passengers of MV Doña Paz. The Court ruled that "MT Vector was unseaworthy at the time of the accident and that its negligence was the cause of the collision that led to the sinking of the Sulpicio vessel." A former captain told investigators that the rudder was defective and that it took two men to steer the wheel. An inquiry also found that members of the crew of Vector were underqualified and that the vessel's licence had expired.
Wreck
The wreck of Vector was found by RV Petrel on December 19, 2019. She lies straight side up at a depth of 500 meters. Doña Paz was found lying 2200 meters away in the same state. Both wrecks are in good condition.
