Reg,
Have you looked for Your relation on the LDS site? I've just found this entry:
Geo.B. BEDFORD Household
Male
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Other Information:
Birth Year <1846>
Birthplace Ireland
Age 35
Occupation Lieutenant
Marital Status U <Unmarried>
Head of Household Rob.D.B. BRUCE
Relation Other
Disability
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Source Information:
Vessel "Crocodile"
Census Place Royal Navy, England
Family History Library Film 1342354
Public Records Office Reference RG11
Piece / Folio 5633 / 7
Page Number 1
Could it be his son, as this was from the 1881 census? Bit of a coincidence, his being on the Crocodile too!