The Scottish Fisheries Protection Agency (SFPA) decided to terminate the tendering process for a new patrol vessel after problems were identified with the tendering process.
Since porphyrins are taken up by blood vessels, some researchers reckon that they might be useful in treating atherosclerosis an inflammatory process that thickens and damages the vessel wall.
He said some campaigners appeared to misunderstand the difference between a search and rescue vessel and an emergency tow vessel, and the nature of the contract process.