# The Last Call over Bass Strait [View on uap.fun]() CASE FILE 029 · 1978 Published: September 18, 2026 · Updated: September 28, 2026 Alone over Bass Strait at dusk in October 1978, twenty-year-old pilot Frederick Valentich radioed that something with four lights was playing games with his Cessna. “It’s not an aircraft,” he said, then described a long shiny shape with a green light hovering over him. His engine began to cough, and then came seventeen seconds of open microphone, and nothing. The official finding, four years on, was one sentence: cause not determined. ![Four distant lights above a dark ocean at dusk, seen through a weathered light-aircraft windshield above dim amber instruments. AI-generated illustration.]() AI-generated illustration · Not a real photo. Inspired by the reported lights over Bass Strait; cockpit and light arrangement are illustrative. ## AT A GLANCE - **DATE:** October 21, 1978 - **LOCATION:** Bass Strait, between Cape Otway, Victoria, and King Island - **REPORT TYPE:** Aviation encounter - **RESOLUTION:** [Unexplained]() - **RECORD STATUS:** Missing aircraft; cause officially undetermined ## The story ### A Saturday flight into the last light At 5:23 p.m. on Saturday, October 21, Frederick Valentich filed for a night visual flight from Moorabbin Airport to King Island and back, below 5,000 feet. He was twenty, held a private licence and a Class Four instrument rating, and had about 150 flying hours. The rented Cessna 182L, VH-DSJ, was filled to capacity at 6:10. Nine minutes later he departed alone, carrying four life jackets and enough fuel for roughly five hours. His route ran southwest to the unmistakable Cape Otway lighthouse, then across the blackening water of Bass Strait. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [The Mystery of VH-DSJ]() ### Cape Otway at seven o’clock Valentich reported over Cape Otway at about 7:00 p.m. and said he was continuing to King Island. The official weather reconstruction described light winds, excellent visibility and little low cloud; daylight at the cape would end around 7:18. No radar plot fixed VH-DSJ’s later position, so nearly everything that follows rests on the recorded radio exchange and on the route Valentich said he was flying. At 7:06:14 he called Melbourne Flight Service and asked a plain question: was any known traffic operating below 5,000 feet? Flight service officer Steve Robey answered that there was none. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [Last Light: The Valentich Mystery]() ![A white-railed path leads to Cape Otway’s white lighthouse, with scrub and blue sea beyond.]() The last landmark before open water: Cape Otway lighthouse, photographed on October 12, 2019. Valentich reported passing the cape at about 7 p.m., six minutes before asking about unknown traffic. Photo: Dietmar Rabich / Wikimedia Commons; resized and converted to WebP. [Image source]() [CC BY-SA 4.0]() ### Four bright lights Valentich said there seemed to be a large aircraft below 5,000 feet. He could not identify its type; what he first made out were four bright lights, like landing lights. Then he said it had passed at least 1,000 feet above him. Robey asked whether it was large. Valentich could not judge because of its speed and asked if an Air Force aircraft was nearby. Again the answer was no known aircraft. “It seems to me that he’s playing some sort of game,” Valentich said at 7:08. “He’s flying over me two—three times at a time at speeds I could not identify.” His voice made the encounter immediate: not a story assembled afterward, but a pilot trying to name something while watching it move. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [Transcript of Frederick Valentich’s final communications with Melbourne Flight Service]() · [The Valentich Disappearance: Another UFO Cold Case Solved]() ### A long shape circling overhead Robey asked for his level—4,500 feet, Valentich said—and whether he could confirm he could not identify the aircraft. “Affirmative.” Then, after a pause: “Melbourne—Delta Sierra Juliet. It’s not an aircraft… it is”—and two seconds of open microphone. Asked to describe it: “As it’s flying past it’s a long shape… (cannot) identify more than that. It has such speed… It is before me right now Melbourne.” Robey asked how large it was. “It seems like it’s stationary. What I’m doing right now is orbiting, and the thing is just orbiting on top of me also… It’s got a green light, and sort of metallic like. It’s all shiny on the outside.” At 7:10:48: “It’s just vanished.” Then, a question Robey could not answer: “Melbourne, would you know what kind of aircraft I’ve got? Is it a type military aircraft?” A moment later it was back, “approaching from the southwest.” The transcript preserves hesitations and open-microphone gaps that polished retellings often remove; the description developed unevenly from lights, to an unknown aircraft, to a long reflective form. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [Transcript of Frederick Valentich’s final communications with Melbourne Flight Service]() · [The Valentich Disappearance: Another UFO Cold Case Solved]() ### The engine begins to cough At 7:11:52 Valentich reported that the engine was rough-idling. “I’ve got it set at twenty three—twenty four,” he said, presumably the manifold pressure, “and the thing is coughing.” Robey asked his intentions. Valentich still intended to proceed to King Island. Seconds later he reported the strange aircraft hovering above him again: “It is hovering and it’s not an aircraft.” At 7:12:28 he called “Delta Sierra Juliet, Melbourne,” followed by seventeen seconds of open microphone. The official transcript does not characterize the sound. Newspapers and later accounts called it metallic scraping, but the investigation established no source. There was no Mayday, ditching position or further voice. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [Transcript of Frederick Valentich’s final communications with Melbourne Flight Service]() · [Last Light: The Valentich Mystery]() ### The empty frequency Robey kept calling VH-DSJ. The alert phase began as contact failed; when the Cessna did not reach King Island, distress procedures followed at 7:33 p.m. Aircraft, ships and shore parties entered the search. An RAAF P-3 Orion and eight civilian aircraft helped examine more than 1,000 square miles—about 2,600 square kilometres—of sea. An oil slick north of King Island was sampled but not connected to VH-DSJ. No emergency beacon, body or confirmed wreckage appeared. The intensive search ended October 25, leaving a voice recording, a flight plan and an aircraft-shaped absence over the strait. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [VH-DSJ — Light Aircraft Overdue King Island]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() ### Six frames at Crayfish Bay About twenty minutes before Valentich’s first call, a holidaying Melbourne plumber named Roy Manifold set a 35 mm camera on automatic sequencing at Crayfish Bay, two and a half kilometres east of the Cape Otway lighthouse, to photograph the sunset over Bass Strait. It took six frames. When the film came back, two of them held something he had not seen: in the fourth, what Australian researchers described as a dense “black lump” on the water, as if something were rising from it; in the sixth, a mass in the sky directly above that spot, trailing what looked like exhaust. Film faults were ruled out. The RAAF suggested a cumulus cloud breaking up. Ground Saucer Watch in the United States, which computer-enhanced the frames, called the object “a bona fide unknown flying object, of moderate dimensions, apparently surrounded by a cloud-like vapour/exhaust residue”; skeptics have suggested an out-of-focus insect or a passing bird. The photographs prove that a camera was pointed at the strait that evening and that something is on two of its frames. Nothing ties the smudge to the shape Valentich described a little later, somewhere out over the water. Sources: [A catalogue of UAP reports from Victoria, Bass Strait and Tasmania at the time of the Valentich disappearance]() · [Frederick Valentich’s ‘UFO’ Sighting and Disappearance]() ### An investigation with no neat pilot portrait The Department of Transport reconstructed the flight through instructors, friends, family, maintenance records, weather, radar analysis and the tape. Valentich was ambitious about aviation but inexperienced. He had struggled with commercial-licence examinations and had drawn official attention for earlier flying infringements. He was also interested in UFOs before the flight—he had reported one of his own about ten months earlier, his father said, and had told his girlfriend days before, “If a UFO landed in front of us now, I would go in it, but never without you”—important context for perception, but not proof of invention. Even the journey’s purpose stayed unsettled: he mentioned collecting friends to officials and crayfish to others, while investigators confirmed neither arrangement. The file did not turn those contradictions into evidence of a hoax or planned disappearance. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [Flying Saucers — Fact or Fiction?]() · [Frederick Valentich’s ‘UFO’ Sighting and Disappearance]() · [Leaving this world]() ### A father who kept the tape His father, Guido, refused the ordinary explanations from the first week. “The fact that they have found no trace of him really verifies the fact that UFOs could have been there,” he told the Associated Press. His son, he said, “was not the kind of person who would make up stories. Everything had to be very correct and positive for him.” He believed Frederick was being “held by people from another planet” and might be returned “in a week or so”; the marine search-and-rescue file records, in an official hand, that “the pilot’s father believed that a UFO had taken his son.” When the theories turned to a staged disappearance he denied that too. The Department of Transport, which treated recorded transmissions as confidential, made him one exception in March 1979: “I am happy to give you a taped copy of your son’s voice to have as a keepsake.” Sources: [Frederick Valentich’s ‘UFO’ Sighting and Disappearance]() · [The Valentich files released by the Australian National Archives]() · [The Valentich radio transmissions]() · [VH-DSJ — Light Aircraft Overdue King Island]() ### What seventeen seconds became The terminal noise grew into the case’s signature artifact. Yet the primary report says only “17 seconds open microphone.” Three days after the flight an investigator recorded a conversation with Valentich’s girlfriend, Rhonda Rushton, then seventeen. She told him that Valentich usually clicked the microphone button after transmitting and never put the microphone back in its rack but left it on his lap, “where because of his leg actions, it was sometimes activated”; that he had long legs and would release his seat and push it back; and that the “metallic noises” in the newspapers “could have been the seat sliding forward, with the microphone transmitting.” A later spectrum study using a copy tape found rapid microphone keying the closest cockpit comparison, though not a perfect match. The original operational tape was eventually reused, leaving surviving copies and recollections rather than a pristine recording that can be tested again. Sources: [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [The Valentich radio transmissions]() · [Last Light: The Valentich Mystery]() ### A white cowl flap on Flinders Island In May 1983 an engine cowl flap washed onto a Flinders Island beach on the eastern side of Bass Strait. The Bureau of Air Safety Investigation identified it as coming “from a Cessna 182 between a certain range of serial numbers,” a range that included VH-DSJ, and in July asked the Royal Australian Navy’s research laboratory how likely it was that a part could have drifted there from the area where the aircraft vanished. Nothing conclusive came back. The part bore no unique identifier tying it to Valentich’s aircraft, and other Cessna 182s existed. It remains a tantalising possibility, not recovered proof: a component compatible with the missing model, found five years later in a sea connected by plausible drift. Sources: [The Mystery of VH-DSJ]() · [The Valentich files released by the Australian National Archives]() ### The sentence that would not close the story The accident summary was approved on April 27, 1982. Under “Opinion as to cause,” the report approved by A. R. Woodward carries one enduring sentence: “The reason for the disappearance of the aircraft has not been determined.” The outcome was presumed fatal. The full file later entered the National Archives, exposing both the extraordinary transmission and the ordinary machinery of accident inquiry—oil tests, weather charts, interviews, radar limitations and unanswered correspondence. A 1979 television crew retraced the route and landed safely at Currie, asking why Valentich had not. The question survives because no physical scene has ever answered it. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [In ‘Search’ for Valentich]() · [Last Light: The Valentich Mystery]() ![Final page of the official accident summary, preserving the last radio calls, seventeen seconds of open microphone, and the undetermined-cause finding approved on April 27, 1982.]() The last transmission and the official conclusion share a page. The transcript records seventeen seconds of open microphone; below the search summary, the cause remains undetermined. Department of Transport, April 27, 1982; via the Australian Transport Safety Bureau. Complete page rendered from the scanned report. [Image source]() [CC BY 4.0]() ## The evidence ### What is firmly documented VH-DSJ departed Moorabbin at 6:19 p.m.; Valentich reported Cape Otway around 7:00; Melbourne recorded his six-minute description of unknown lights and a shiny long form, followed by rough engine operation and seventeen seconds of open microphone; the Cessna did not arrive; and a four-day search found no confirmed trace. The transcript is strong evidence for what Valentich reported in real time. It is not independent visual, radar or physical confirmation of the object he believed was near him. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [VH-DSJ — Light Aircraft Overdue King Island]() ### Disorientation and the bright-sky hypothesis James McGaha and Joe Nickell proposed that four bright celestial points—planets and Antares—suggested a diamond of lights while Valentich entered a graveyard spiral; his own turning would make fixed lights appear to orbit, and increasing load could disturb fuel flow and roughen the engine. The hypothesis joins several details with a known fatal aviation mechanism. Its limits are equally clear: there is no flight-path recorder, radar track, wreckage attitude or recovered engine, and Valentich also described a long, fast-moving, shiny form. It is a plausible reconstruction, not an official solution. Sources: [The Valentich Disappearance: Another UFO Cold Case Solved]() · [Flying Saucers — Fact or Fiction?]() · [Aircraft Accident Investigation Summary Report 197802563]() ### Hoax, escape and anomalous encounter A deliberate disappearance has been suggested from the uncertain purpose of the trip, unconfirmed position and remaining fuel. The official inquiry found no destination, accomplice or later trace to complete that scenario. An extraterrestrial encounter explains the story only by accepting Valentich’s interpretation of what he saw; no second observer securely tracked an object with him, and later regional UFO reports cannot be synchronized closely enough to supply that missing corroboration. The record supports a genuine disappearance during a genuine report of something unidentified, while leaving the two events’ causal relationship unresolved. Sources: [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [Aircraft Accident Investigation Summary Report 197802563]() · [Last Light: The Valentich Mystery]() ### Classification This archive classifies the event as an aviation encounter and missing-aircraft case. Its status remains the Department of Transport’s: cause undetermined, outcome presumed fatal. No confirmed wreckage, radar track, photograph or physical trace identifies what Valentich described. Sources: [Aircraft Accident Investigation Summary Report 197802563]() · [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() · [Submerged Aircraft Wrecks Program: Cessna 182L VH-DSJ]() ## Timeline - **21 OCT 1978 · 5:23 PM:** Valentich files a night-VMC flight plan from Moorabbin to King Island and return, via Cape Otway below 5,000 feet. - **6:10 PM:** Cessna 182L VH-DSJ is refuelled to capacity. - **6:19 PM:** Valentich departs Moorabbin alone with about five hours of fuel endurance. - **ABOUT 6:45 PM:** At Crayfish Bay near Cape Otway, holidaymaker Roy Manifold’s automatic sunset sequence records a dark mass on two of six frames. - **ABOUT 7:00 PM:** He reports Cape Otway and says he is proceeding across Bass Strait to King Island. - **7:06:14 PM:** He asks Melbourne Flight Service about traffic below 5,000 feet; Steve Robey replies that none is known. - **7:06–7:11 PM:** Valentich reports four bright lights, repeated high-speed passes, a long shape, a green light and a shiny exterior apparently orbiting above him. - **7:11:52 PM:** He reports rough idling and a coughing engine, “set at twenty three—twenty four.” - **7:12:28 PM:** After saying the object is hovering and is not an aircraft, he calls Melbourne; seventeen seconds of open microphone follow. - **7:33 PM:** When VH-DSJ fails to arrive at King Island, the distress phase is declared and intensive search action begins. - **22–25 OCT 1978:** Military and civilian aircraft, ships and shore parties search more than 1,000 square miles without a confirmed find; Guido Valentich tells reporters he hopes his son was taken by a UFO. - **24 OCT 1978:** Rhonda Rushton tells an investigator about Valentich’s habit of leaving the microphone on his lap. - **5 MAR 1979:** The Department of Transport sends Guido Valentich a copy of the tape “to have as a keepsake.” - **27 APR 1982:** The accident summary is approved: the disappearance’s reason is not determined and the outcome is presumed fatal. - **MAY 1983:** A Cessna 182 cowl flap compatible with VH-DSJ’s serial-number range is found on Flinders Island; a Navy drift inquiry is inconclusive. - **2012:** The extensive Department of Transport investigation file becomes publicly accessible through the National Archives of Australia. ## Sources & interviews - [Aircraft Accident Investigation Summary Report 197802563]() — Australian Department of Transport / Australian Transport Safety Bureau · V116/783/1047 · approved April 27, 1982 - [DSJ — Cape Otway to King Island, 21 October 1978 — Aircraft Missing (Valentich)]() — National Archives of Australia · B1497, V116/783/1047, item 10491375 · 1978–1992 investigation file - [VH-DSJ — Light Aircraft Overdue King Island]() — National Archives of Australia · A4703, 1978/1205, item 11485989 · contemporary marine search-and-rescue file - [Flying Saucers — Fact or Fiction?]() — National Archives of Australia · collection feature on official Australian UFO records - [Submerged Aircraft Wrecks Program: Cessna 182L VH-DSJ]() — Heritage Victoria · Victorian Government · maritime-heritage record - [Last Light: The Valentich Mystery]() — Patrick Stokes · ABC Radio National, The History Listen · June 4, 2019 · interviews with Steve Robey and Rhonda Rushton - [The Valentich Disappearance: Another UFO Cold Case Solved]() — James McGaha and Joe Nickell · Skeptical Inquirer 37(6) · November/December 2013 - [In ‘Search’ for Valentich]() — King Island News · October 24, 1979 · National Library of Australia Trove - [Transcript of Frederick Valentich’s final communications with Melbourne Flight Service]() — Department of Transport transcript with Richard Haines’s annotations · Reproduced by UFO Research (NSW) - [The Valentich files released by the Australian National Archives]() — Keith Basterfield · June 28, 2012 · Summary of the Department of Transport and marine search-and-rescue files - [The Valentich radio transmissions]() — Keith Basterfield · June 23, 2013 · The open-microphone analysis, Rhonda Rushton’s 1978 statement and the Department’s letter to Guido Valentich - [A catalogue of UAP reports from Victoria, Bass Strait and Tasmania at the time of the Valentich disappearance]() — Keith Basterfield · Project 1947 · June 2013 · Includes Roy Manifold’s Crayfish Bay photographs - [Frederick Valentich’s ‘UFO’ Sighting and Disappearance]() — Jordan Liles · Snopes · December 3, 2021 · Reproduces the 1978 AP and UPI reports, including Guido Valentich’s statements - [The Mystery of VH-DSJ]() — W. Dearing · Tasmanian Aviation Historical Society · July 2020 · Includes the Flinders Island cowl-flap inquiry - [Leaving this world]() — Robert Wilson · Flight Safety Australia · February 24, 2025 · Aviation-safety retrospective drawing on the investigation file Spotted an error, or know a better source? Write to hello@uap.fun. ## Connected files - [The Lights beside the Newspaper Plane]() — Two months later, another southern-ocean flight produced lights, radar reports, recorded voices—and this time, colour film. - [The Lights Beside Flight 1628]() — A freight captain’s luminous companions also unfolded over an open radio channel, but his aircraft returned safely. - [The Green Light over Mansfield]() — Another pilot reported a green-lit object close to his aircraft, with a full crew available to compare memories afterward. - [The Tehran Intercept]() — Military pilots, controller traffic and reported instrument effects form a different kind of aviation mystery. ## A NOTE ON EVIDENCE Unidentified describes a limit of the available information. It doesn’t identify an origin. [NEXT CASE FILE: The Phantom on the Flatwoods Hill]()