The Sealandic flag in use at summit of micronations.

The flag of the Principality of Sealand was introduced as the official flag of the Principality in 1968. Image File history File links Flag_of_Sealand. ... Year 1968 (MCMLXVIII) was a leap year starting on Monday (link will display full calendar) of the Gregorian calendar. ... The Principality of Sealand is a micronation located on HM Fort Roughs, a former Maunsell Sea Fort located in the North Sea 10 km (six miles) off the coast of Suffolk, England, in what is claimed as territorial waters using a twelve-nautical-mile radius. ...

Configuration

The flag has the following configuration:

Red triangle: Extending from top left outward to 0.97 of total width extending from top left downward to 0.93 of total height.

Black triangle: Extending inward from lower right edge toward mast to 0.68 of total width extending upward from lower right edge to 0.63 of total height.

Intervening white banner: Extending from outer top edge to inner bottom edge, running top right to bottom left.

Colours used: Pantone red 032 Pantone jet black Pantone opaque white

Use

The flag is for commercial and maritime use and has been used at the Summit of Micronations 2003 in Helsinki, Finland. The Principality Standard however is for state occasions and includes the Sealandic coat of arms within a white rectangular panel. The configuration is as follows: Year 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Location of Helsinki in Northern Europe Coordinates: , Country Province Region Uusimaa Sub-region Helsinki Charter 1550 Capital city 1812 Government  - City manager Jussi Pajunen Area  - City 187. ...

Shape: rectangular, aspect ratio [width to height] 1.09. Dimensions: width: 0.28 of flag width; height: 0.38 of flag height. Position [from mast edge at left and outward to right]: position from mast edge: to left, 0.06 of total flag width; position from top edge: below, 0.08 of total flag height.

See also

Principality of Sealand The Principality of Sealand is a micronation located on HM Fort Roughs, a former Maunsell Sea Fort located in the North Sea 10 km (six miles) off the coast of Suffolk, England, in what is claimed as territorial waters using a twelve-nautical-mile radius. ...

References

1. http://www.crwflags.com/fotw/flags/gb!seald.html