You do have a neck problem,probabaly spondylitis
.that may be cuasing the vertigo.Your symptoms donot suggest labyrinthitis
.The acute hearing loss
could happen to anyone..indicates sensorineural hearing loss possibly Noise induced as you work on a ship I think.For both conditions I can suggest a treatment formula which has worked on all my patients quite consistently.But you need to be persistant and try this for 3months at least..to get good results.In one month you can make out the diffeerence.Please reduce noise exposure..use ear muffs..they cut out 30 0/0 of the noise.Please take Tab.vertin16 mg thrice daily with T.Neurobion
once daily and Tab.GINKOBA thrice daily for a month.continue for at least 3-6 months if you feel some betterment.You will.