Royal Navy Weapon Engineering Branch Submarine Sensor Qualification Badge for the rank of Petty Officer.
This white machine embroidered RN badge features an embroidered blue vertical trident missile, horizontal spearfish torpedo, superimposed on a globe, two satellites and two flashes with the letters 'WESM' below the device with a crown above.
This badge is typically worn on the right-hand shoulder of a Royal Navy No.4 Dress blue shirt. Specialist badges are worn on the sleeves with insignia representing each branch or specialisation.
Have you also seen the King's Crown version here
