Commander and Lieutenant Commander
These ranks should not be abbreviated.
How to Address a Commander or Lieutenant-Commander
The recommended style of address is as follows:
Beginning of letter | Dear Commander/Lieutenant-Commander Jones |
End of letter | Yours sincerely |
Envelope | Commander John Smith, CBE, Royal Navy; Lieutenant Commander James Jones, Royal Navy |
Verbal communication | Commander Smith*/Lieutenant Commander Smith |
Invitation | Commander John Smith/Lieutenant Commander James Jones |
Description in conversation | Commander Smith/Lieutenant Commander Jones |
List of Directors or Patrons | Commander John Smith; Lieutenant Commander James Jones |
Place card | Commander John Smith/Commander James Jones |
*A younger man, or a more junior officer in any of the Armed Forces, addresses him as 'Sir'.