Stern Navigation Light, Stainless Steel 135° – Vertical Mount (White)

The stern light 11.414.04 is an integral part of any vessel’s navigation setup – it marks the stern (rear) of the vessel during night navigation or in reduced visibility. This model is designed for boats up to 12 m in length and has a horizontal beam angle of 135°. That covers the sector from directly aft to 67.5° on each side. Thus, boats approaching from behind can see your white light and discern your direction of travel.

The light’s housing is all stainless steel, part of Osculati’s Utility 85 series known for high quality and compact design. Using AISI316 stainless steel means the lamp is resistant to the harsh marine environment: salt spray, UV rays, and temperature changes will not harm it. The polished finish not only looks stylish but also reflects some of the light, improving visibility at certain angles, and is easy to clean of salt and grime.

Installation is very straightforward – the back of the housing is flat with two screw holes (usually one above the other). This allows for secure attachment to a vertical transom surface or stern rail. When mounting, it’s good practice to use a gasket or marine sealant for waterproofing. The lamp’s dimensions (~8 x 5.8 x 3.8 cm) make it easy to find space for, even on narrow transoms or stern areas crowded with equipment. Once installed, the light hardly protrudes and won’t snag lines or fishing rods.

Functionally, the stern lamp emits a bright white light aft. The included 12V/10W halogen bulb is standard for such applications and provides visibility of around 2 nautical miles – sufficient for small vessels. The halogen lamp generates minimal heat in this enclosure, thanks in part to the metal acting as a heat sink. If you prefer LED for longer life and even lower consumption, you can upgrade to an LED bulb as long as it fits the reflector and voltage (keeping in mind the fixture is designed and certified with halogen originally).

Usage & Recommendations:

• For all boat types up to 12m: This stern light is universal and suitable for sailing and motor boats in the small to mid size range. For powerboats, it works in conjunction with bow lights (bi-color or two separate) and a masthead light to provide the full array. For sailboats under engine power – it pairs with sidelights or a tri-color (if the tri-color is off, then this serves as the separate stern light).
• Mounting height: International rules require the stern light to be placed at a sufficient height so it’s not obscured by waves and doesn’t blind the helmsman. In practice, mount it as high as feasible on the stern – often on the stern rail or top of the transom. On sailboats, it’s frequently installed on the pushpit (stern rail), and on motorboats – on a transom bracket or atop an aft cabin. The model’s compactness gives flexibility – it can even go on a vertical pole if needed.
• Integration with series: As mentioned, this light is part of a stainless steel series. For best aesthetic and practical results, pair it with the bi-color bow light (11.414.05) and the masthead 225° light (11.414.03) from the same line. That way your boat will have a unified lighting style – all fixtures with matching design and quality, which also eases maintenance (same bulbs, parts).
• Safety and compliance: Osculati 11.414.04 is certified to standards for boats up to 12m, meaning you can rely on it to meet regulations. This is especially important for inspections or insurance. Having a dependable stern light reduces the risk of collision – boats coming up from behind will spot you in time. Remember that the stern light is also used when you’re at anchor (if you don’t have a separate 360° anchor light, although rules actually require a 360° white at anchor).
• Long-term investment: By purchasing a stainless light, you’re basically making a one-time investment. Unlike plastic ones that might need replacement after 5-6 years due to aging, this one will likely last as long as the boat itself. All that’s needed is periodic checks of the electrical connections and replacing the bulb when it burns out.

With the stainless stern light 135° (11.414.04) you complete your set of premium navigation lights. Your boat will be visible, elegant, and compliant with regulations, giving you confidence and peace of mind during night voyages. Five Marine delivers a product that will serve you faithfully and stand out with quality – a significant advantage over cheaper, short-lived solutions on the market.