CATSIW
- danger: a signal or message warning of the
presence of a danger to navigation.
- maritime obstruction: a signal or message
warning of the presence of a maritime obstruction.
- cable: a signal or message warning of the
presence of a cable.
- military practice: a signal or message warning
of activity in a military practice area.
- distress: a station that may receive or
transmit distress signals.
- weather: a visual signal displayed to indicate
a weather forecast. (IHO Dictionary, S-32, 5th Edition, 4740)
- storm: a signal or message conveying
information about storm conditions.
- ice: a signal or message conveying information
about ice conditions.
- time: an accurate signal marking a specified
time or time interval. It is used primarily for determining errors of timepieces. Such
signals are usually sent from an observatory by radio or telegraph, but visual signals are
used at some ports. (IHO Dictionary, S-32, 5th Edition, 4735)
- tide: a signal or message conveying
information on tidal conditions in the area in question. (IHO Dictionary, S-32, 5th
Edition, 4734)
- tidal stream: a signal or message conveying
information on condition of tidal currents in the area in question. (IHO Dictionary, S-32,
5th Edition, 4733)
- tide gauge: a device for measuring the height
of tide. A graduated staff in a sheltered area where visual observations can be made; or
it may consist of an elaborate recording instrument making a continuous graphic record of
tide height against time. Such an instrument is usually actuated by a float in a pipe
communicating with the sea through a small hole which filters out shorter waves. (IHO
Dictionary, S-32, 5th Edition, 1984)
- tide scale: a visual scale which directly
shows the height of the water above chart datum or a local datum. (IHO Chart
Specifications, S-4, 496)
- diving: a signal or message warning of diving
activity
- water level gauge: a device for measuring and conveying information about the water level (non-tidal) in the area in question.