They were designed to make Britain ’ s sailors look ‘ cool and modern ’ . But the Royal Navy ’ s new uniform was ridiculed yesterday by being compared to the outfits worn by garage mechanics . The all-navy blue gear will replace the outfit worn by serving military personnel since the Second World War and was welcomed by the Defence Ministry as ‘ cool and more modern ’ . Scroll down for video . The old Royal Navy uniform of light blue shirt and dark blue trousers , left , is being replaced with all-navy blue gear , right . But Twitter user Tony Shumacher wrote : ‘ Royal Navy unveils “ modern ” uniform… sponsored by Kwik Fit ? ’ Jamie Frost , a seaman who trains at the University Royal Naval Unit , said it ‘ reduces RN personnel to looking like garage car mechanics ’ . The new attire , which replaces the action working dress known as No4s , has been tested on ships and submarines . The Navy says the feedback from sailors so far has been ‘ mostly positive ’ . The new uniform has been ridiculed by being compared to the outfits worn by garage mechanics . It is only to be worn during operational duties and will not replace more formal uniforms or berets and old caps . It is only to be worn during operational duties and will not replace more formal uniforms or berets and old caps . A layering system allows it to be adapted for different climates . The crew of frigate HMS Lancaster will be the first to deploy in the Royal Navy personal clothing system ( RNPCS ) when they begin an Atlantic patrol tomorrow . The crew of frigate HMS Lancaster , pictured will be first to wear the uniforms , when they begin an Atlantic patrol tomorrow .
Royal Navy has unveiled first new uniforms since the Second World War . The all-navy blue gear has been welcomed by MoD as 'cool and modern ' But others have ridiculed it , saying it looks like outfits worn by mechanics . It will only be worn during operational duties and wo n't replace formal uniform .