Marine Hazard & Warning Signs (Yellow)

Yellow hazard and warning signs for vessels, offshore platforms, docks and beaches – electrical and voltage warnings, toxic and H₂S gas, CO₂ protected areas, hot surfaces, overhead loads, fall overboard, chemicals and water-safety warnings, with or without Danger/Warning/Caution text. 182 hazard and warning signs Symbol-only and Danger / Warning / Caution text versions Voltage signs from 110 V to 6600 V Rigid fiberglass or self-stick polyester – UV and salt-water resistant How to order Choose your sign in the picker – search by name or stock number, or tap a size to filter. Pick a material – the full stock number (e.g. 1802-150) is added to your order automatically. Enter a quantity and add to cart. Repeat for as many different signs as you need – they all go in one order. Price per sign Size CM-150 Rigid Polyester CM-550 Self-Stick Polyester 150 × 150 mm 5.9″ × 5.9″ $7.20 $4.32 150 × 200 mm 5.9″ × 7.9″ $9.60 $5.76 Materials CM-150 Rigid Polyester – Tough all-weather polyester laminated to a rigid 2.28 mm fiberglass base with a polyester overcoat. UV, salt-water and abrasion resistant, mounted with strong adhesive foam strips. Stock # ends in -150. CM-550 Self-Stick Polyester – Ultra-durable polyester film with an aggressive acrylic self-stick adhesive and clear polyester overcoat, for direct interior or exterior application. UV, salt-water and moisture resistant. Stock # ends in -550. All 182 signs in this series 1802 Acid/Corrosive Materials (150 × 150 mm) 1803 Arc flash warning (150 × 150 mm) 1804 Area Protected by CO2 (150 × 150 mm) 1805 Asphyxiating atmosphere warning (150 × 150 mm) 1806 Automatic start-up warning (150 × 150 mm) 1807 Battery charging warning (150 × 150 mm) 1808 Bio hazard (150 × 150 mm) 1809 Boating area warning (150 × 150 mm) 1810 Crocodiles, alligators or caymans warning (150 × 150 mm) 1811 Crushing of hands warning (150 × 150 mm) 1812 Crushing warning (150 × 150 mm) 1813 Danger of death (150 × 150 mm) 1814 Deck opening (150 × 150 mm) 1815 Deep shelving beach (150 × 150 mm) 1816 Deep water (150 × 150 mm) 1817 Diving area (150 × 150 mm) 1818 Drop-off hazard (150 × 150 mm) 1819 Electrical (150 × 150 mm) 1820 Explosive atmosphere (150 × 150 mm) 1821 Explosive risk (150 × 150 mm) 1822 Falling ice (150 × 150 mm) 1823 Falling man (150 × 150 mm) 1824 Falling objects (150 × 150 mm) 1825 Fall overboard (150 × 150 mm) 1826 Fall risk (150 × 150 mm) 1827 Flammable materials (150 × 150 mm) 1828 Forklift trucks (150 × 150 mm) 1829 Gas cylinders (150 × 150 mm) 1830 Hand crushing between press brake and material warning (150 × 150 mm) 1831 Hand crushing between press brake tool warning (150 × 150 mm) 1832 Harmful irritant (150 × 150 mm) 1833 Heavy duty forklift (150 × 150 mm) 1834 Helicopter blade (150 × 150 mm) 1835 High noise area (150 × 150 mm) 1836 High surf or large breaking waves warning (150 × 150 mm) 1837 Hot surface (150 × 150 mm) 1838 Hot liquid (150 × 150 mm) 1839 Hot surface (hand symbol) (150 × 150 mm) 1840 Incoming tides warning (150 × 150 mm) 1841 Inflatable warning (150 × 150 mm) 1842 Kite surfing warning (150 × 150 mm) 1843 Land rig crane (150 × 150 mm) 1844 Laser beam warning (150 × 150 mm) 1845 Low temperature (150 × 150 mm) 1846 Magnetic field (150 × 150 mm) 1847 Mind your head (150 × 150 mm) 1848 Mind the lift doors (150 × 150 mm) 1849 Moving/rotating load (150 × 150 mm) 1850 Non-ionizing radiation pole (150 × 150 mm) 1851 Offshore crane (150 × 150 mm) 1852 Optical radiation warning (150 × 150 mm) 1853 Overhead load warning (150 × 150 mm) 1854 Oxidizing substance warning (150 × 150 mm) 1855 Parasailing warning (150 × 150 mm) 1856 Poison Fish (150 × 150 mm) 1857 Poison/toxic hazard (150 × 150 mm) 1858 Pressurized cylinder warning (150 × 150 mm) 1859 Pressurized tanks (150 × 150 mm) 1860 Quicksand or mud, deep mud or silt warning (150 × 150 mm) 1861 Radioactive materials (150 × 150 mm) 1862 Rapid movement of workpiece in press brake warning (150 × 150 mm) 1863 Risk (150 × 150 mm) 1864 Rowing area warning (150 × 150 mm) 1865 Sailing area warning (150 × 150 mm) 1866 Sand yachting warning (150 × 150 mm) 1867 Sewage effluent outfall warning (150 × 150 mm) 1868 Shallow water (diving) warning (150 × 150 mm) 1869 Sharks warning (150 × 150 mm) 1870 Sharp element warning (150 × 150 mm) 1871 Slippery surface (150 × 150 mm) 1872 Slipway (150 × 150 mm) 1873 Stepping hazard (150 × 150 mm) 1874 Strong currents (150 × 150 mm) 1875 Strong wind (150 × 150 mm) 1876 Submerged objects (150 × 150 mm) 1877 Sudden drop in swimming or leisure pools (150 × 150 mm) 1878 Sudden loud noise (150 × 150 mm) 1879 Surf craft area (150 × 150 mm) 1880 Swimming area (150 × 150 mm) 1881 Thin ice (150 × 150 mm) 1882 Towed water activity area (150 × 150 mm) 1883 Toxic Gas (150 × 150 mm) 1884 Toxic H2S gas (150 × 150 mm) 1885 Unprotected edges (150 × 150 mm) 1886 Unstable cliff (150 × 150 mm) 1887 Unstable cliff edge (150 × 150 mm) 1888 Vessels crossing (150 × 150 mm) 1889 Warning earth terminals (150 × 150 mm) 1890 Acetylene (150 × 200 mm) 1891 Acid (150 × 200 mm) 1892 Asbestos (150 × 200 mm) 1893 Battery acid (150 × 200 mm) 1894 Danger Overhead working (150 × 200 mm) 1895 Warning – beware tail rotor (150 × 200 mm) 1896 Danger Biological hazard (150 × 200 mm) 1897 Warning Boating area (150 × 200 mm) 1898 Caustic (150 × 200 mm) 1899 Chlorine (150 × 200 mm) 1900 Warning Cleaning chemicals (150 × 200 mm) 1901 Danger Compressed oxygen (150 × 200 mm) 1902 Danger Compressed gases (150 × 200 mm) 1903 Warning Corrosion risk (150 × 200 mm) 1904 Danger Corrosive substance (150 × 200 mm) 1905 Cyanide (150 × 200 mm) 1906 Danger (150 × 200 mm) 1907 Danger of death (150 × 200 mm) 1908 Dust hazard (150 × 200 mm) 1909 Warning Deep shelving beach (150 × 200 mm) 1910 Deep water (150 × 200 mm) 1911 Diving area (150 × 200 mm) 1912 Danger Electrical hazard (150 × 200 mm) 1913 DANGER Overhead working (150 × 200 mm) 1914 Caution Exhaust fumes (150 × 200 mm) 1915 Caution Explosive gases (150 × 200 mm) 1916 Danger Explosive material (150 × 200 mm) 1917 Caution Explosive risk (150 × 200 mm) 1918 Warning Falling objects (150 × 200 mm) 1919 Fire risk (150 × 200 mm) 1920 Danger Flammable atmosphere (150 × 200 mm) 1921 Danger Flammable liquid (150 × 200 mm) 1922 Caution Forklift truck in operation (150 × 200 mm) 1923 Warning Freezing condition (150 × 200 mm) 1924 Grounding of narrow boat on lock cill (150 × 200 mm) 1925 Grounding of cruiser on lock cill (150 × 200 mm) 1926 Warning Grounding on weir (150 × 200 mm) 1927 Warning Harmful chemicals (150 × 200 mm) 1928 Danger Harmful vapours (150 × 200 mm) 1929 Warning – hazards (150 × 200 mm) 1930 Warning Hazardous area (150 × 200 mm) 1931 Caution Hazardous substance (150 × 200 mm) 1932 Danger Hazardous substance (150 × 200 mm) 1933 Danger Highly flammable gases (150 × 200 mm) 1934 Danger Highly flammable material (150 × 200 mm) 1935 Danger Overhead working (150 × 200 mm) 1936 Warning – Hot (150 × 200 mm) 1937 Danger – Hot (150 × 200 mm) 1938 Hot Surface (150 × 200 mm) 1939 Warning Incoming tides (150 × 200 mm) 1940 Danger of infection (150 × 200 mm) 1941 Warning – inflatables (150 × 200 mm) 1942 Insulate before removing guards (150 × 200 mm) 1943 Danger Ionizing radiation (150 × 200 mm) 1944 Kite surfing (150 × 200 mm) 1945 Danger Flammable atmosphere (150 × 200 mm) 1946 Live wires (150 × 200 mm) 1947 Danger Low flash point (150 × 200 mm) 1948 Danger Low Oxygen (150 × 200 mm) 1949 Danger L.P.G. flammable (150 × 200 mm) 1950 Warning Low temperature (150 × 200 mm) 1951 Danger Men working below (150 × 200 mm) 1952 Caution Mind the step (150 × 200 mm) 1953 Warning Mind your head (150 × 200 mm) 1954 Motor starts and stops automatically (150 × 200 mm) 1955 Danger Moving machinery (150 × 200 mm) 1956 Noise (150 × 200 mm) 1957 Caution Non-ionizing radiation (150 × 200 mm) 1958 Open slowly (150 × 200 mm) 1959 Out of order (150 × 200 mm) 1960 Warning Overhead hazard (150 × 200 mm) 1961 Danger Overhead work (150 × 200 mm) 1962 Oxygen (150 × 200 mm) 1963 Parasailing (150 × 200 mm) 1964 Danger Petroleum vapour (150 × 200 mm) 1965 Danger Uneven surface (150 × 200 mm) 1966 Unmanned machinery space machinery may start without warning (150 × 200 mm) 1967 Warning Unprotected edges (150 × 200 mm) 1968 Warning Unstable cliff (150 × 200 mm) 1969 Danger – Vehicles (150 × 200 mm) 1970 Caution – Vehicles (150 × 200 mm) 1971 Caution Very hot water (150 × 200 mm) 1972 Warning Vessels crossing (150 × 200 mm) 1973 Danger Water skiing area (150 × 200 mm) 1974 Wet deck (150 × 200 mm) 1975 Caution You are entering a CO2 protected area (150 × 200 mm) 1976 110 volts (150 × 200 mm) 1977 115 volts (150 × 200 mm) 1978 220 volts (150 × 200 mm) 1979 240 volts (150 × 200 mm) 1980 440 volts (150 × 200 mm) 1981 380 volts (150 × 200 mm) 1982 3300 volts (150 × 200 mm) 1983 6600 volts (150 × 200 mm) Need a size, wording or language that isn’t listed? Request a quote – Craftmark has made marine markers since 1959. See all marine & IMO safety signs.