underwater
anchorage
anchored
ball
calm
caution
coast
danger
daytime
floating buoy
floating on water
guard
indicator
lake
life
limit
marine
maritime
marker
mooring
nautical
navigation
navigational
navigational devices
no people
object
ocean
protection
protective
red
rescue
rescue equipment
risk
rope
safe
safety
sea
secure
security
sign
signal
sos
summer
swimming zone
symbol
tranquility
transparent
warning
water rescue
yellow