The Ghost Galleon (1974)

Plot

When two models mysteriously disappear from a boat, a rescue team embarks on a search that leads them to an eerie, abandoned galleon. Aboard, they find the coffins of the long-extinct Knights Templar. As they explore the ghostly ship, panic ensues when they realize their own vessel has vanished. Trapped and under siege, the team must confront the vengeful spectral knights, relying on their limited understanding of these ancient warriors to survive. Tension mounts as they fight for their lives against an otherworldly menace.