For the ROCM course it is useful to learn the Phonetic Alphabet (alpha, bravo, charlie…), here’s link to a PDF or see below :

 
 
 

A – alpha

B – bravo

C – charlie

D – delta

E – echo

F – foxtrot

G – golf

H – hotel

I – india

J – juliet

K – kilo

L – lima

M – mike

N – november

O – oscar

P – papa

Q – quebec

R – romeo

S – sierra

T – tango

U – uniform

V – victor

W – whisky

X – x-ray

Y – yankee

Z – zulu