Spain´s Merchant Marine Engineers Officers Insignia

I share with you all these insignia, as a homage and tribute to all students, officers and chief engineers of the Spanish merchant navy.
One, used it to pay homage to Captain Castelo, who died in the crash of M/T"URQUIOLA"(12/05/1976) (http://www.grijalvo.com/Batracius/Urquiola.htm)

Comparto con todos vosotros, estas insignias, a modo de homenaje y tributo a todos los alumnos, oficiales y jefes de máquinas de la marina mercante española.
Una, la utilice para homenajear al Capitan Castelo, q