Is this any help?
from the 1891 Cornwall On-line Census, RG12/1812, ED 9, Parish of East & West Looe, page 29, fol. 106:
209,Market Street,1,Alfred Tiltman,Head,M,50,,Chief Officer Cst Guard,Employed,Ross Devon,
,,,Elizabeth Tiltman,Wife,M,,51,,,Stithians Cornwall,
,,,Louisa Tiltman,Dau,S,,20,Dressmaker (Not'em),,Yealm Devon,
,,,Henry Tiltman,Son,S,15,,Sailmaker,,Charmouth Dorset,
I have a few 19th c. Cornish coastguards in my family tree, including one living at Downderry in 1841. You can email me if you want details. I don't recognise the other stations that you mention.