That fiber specs 10kg/25km. For a shaheed size drone no problem to carry 20kg=50km of spool. Only the rear prop will create a problem, but that can be solved. Design of a 50km drone with fibre optic FPV guidance for over water use is not difficult. Very difficult to spot if it flys low altitude over water, does not have electronic emissions and insensitive to interference. Alternative you make an submerged quiet under water version with electric propulsion. Home in on acoustic noise pattern from any ships propulsion system. That are today cheap systems you can not protect against even with very expensive electronic warfare equipment. That is a very asymmetric threat where the narrow SoH gives Iran a big advantage. You have to complete control 1350nm coast + max. drone and rocket range inland. You will need to control 90 million people and the 6th of the USA size landscape into every corner.
That was known 4 weeks ago, so I wonder what the plan was.