Understen Lighthouse

The Understen lighthouse was constructed in 1915 and has been an important aid to navigation in the Stockholm archipelago ever since its completion.

History

• The Understen lighthouse features a distinctive tower design, standing at a height of 34 meters (112 feet) above sea level. The focal height is 48 meters (157 feet), providing a clear and visible light source for mariners. The structure is made from concrete and features a characteristic green-white-red color scheme.

Light Characteristics

• Segment 1: Green, 34 meters high, with a sector start at 176.7 degrees and an end at 181.4 degrees
• Segment 2: White, 34 meters high, with a sector start at 181.4 degrees and an end at 200 degrees
• Segment 3: Red, 34 meters high, with a sector start at 200 degrees and an end at 215.6 degrees
• Segment 4: White, 34 meters high, with a sector start at 340.2 degrees and an end at 352 degrees
• Segment 5: Red, 34 meters high, with a sector start at 13.5 degrees and an end at 352 degrees
• Segment 6: White, 48 meters high, with a sector start at 215.6 degrees and an end at 352 degrees

Current Status

The Understen lighthouse is currently active and automated, providing a reliable aid to navigation for mariners in the Stockholm archipelago.

Location and Accessibility

Located in Norrtälje kommun, Stockholm County, Sweden, the Understen lighthouse can be accessed by land or sea. The nearest town is Norrtälje kommun, which offers various amenities and services for visitors.

Heritage Status

The Understen lighthouse has been recognized as a culturally significant landmark in Sweden, contributing to the country's rich maritime heritage.

Notable Historical Events

No notable historical events are recorded for the Understen lighthouse.