anchor
attach
background
chain
chandler
circle
close
closeup
connect
construction
decay
detail
fasten
form
group
heavy
industrial
industry
iron
link
marina
marine
maritime
metal
moor
old
pile
port
restraint
restriction
rust
rusting
safe
secure
security
ship
shipping
stability
steel
strength
tanker
texture
tied
together
transportation
up
vessel
vintage
weight