Котлин
"Yelaginsky", located on the Yelagin Channellater moved to the Petrovsky Channel and renamed, "Nevsky" in the middle of the main channel to St. Petersburg, and "Londonsky" on Londonsky Shoal off Kotlin Island on the approach to Kronstadt. Other Baltic lightships were located further to the West, with "Werkommatala" by Primorsk (Koivisto) harbour, "Lyserortsky" at the entrance of the Gulf of Finland, and "Nekmangrund" over the treacherous shoals off Hiiumaa Island's NW shore, known as Hiiu Madal in Estonian.