Macomb was a Manticoran citizen and an officer of the Royal Manticoran Navy.
In 1903 PD, he held the rank of Lieutenant and was assigned to HMS Madrigal as the astrogation officer. (HH2)
Harrington Steading's general hospital was named after Macomb. (HH8)
- ↑ This suggests he was not among the survivors of the Madrigal crew.