The north entrance has a bad reputation as many boats are running aground every year, even though there are warnings in most cruising guides. It is not difficult to navigate safe thru the entrance if you know what to expect. If you have not read the cruising guides it is easy to make a mistake.
When we were anchored in Corfu we heard a Pan-Pan relayed by an English boat. He was relaying a Pan-Pan from a German boat, that was taking in water and sinking in Lefkas canal. It was a painfully slow reaction from the Greek radio operator. He kept asking over and over again for the call sign of the English boat. I´m not sure why they did not understand, the relayed Pan-Pan was correct and very clear.
After 10 minutes I guess the English boat got fed up as it was silence on the channel. Later a Italian boat broke in, and loudly explained the situation, perhaps not accordingly to the book, but very efficient.
If the boat in distress eventually got help I do not know. His grounding gave me a reason to read up on how to enter the canal safely. I did find this Blog that describes the situation quite well.
Coming from sea:
You will see red marker on your port side. Stay away from that side, as there are rocks and remains from and old wall from the fortress. The red markers are marking the rocks and the wall from the fortress.
Groundings have been reported even when you are on the correct side of the red markers. Stay away from this side of the channel.
Stay as close as you dare to the sand-spit. (On your SB when coming from sea) There are no markers on this side (even if indicated on some charts) which means you have to eye ball the depth which is not easy as the water is not clear. It might feel strange to stay close to the obvious shallow part, but at least it is reported to be just sand in case you go to close. With an eye on the echo sounder it should not be a problem to stay at a safe distance from the sand-spit.
It is situations like this, I find the forward looking echo sounder useful.
When we got in to the canal there was a barge digging in the area of the underwater wall from the old fort. Some rocks came up when he was digging. I´m not sure if the operation is standard dredging or that they are actually trying to remove the rocks and underwater wall? We could see large stones coming up!
After the canal there is a low bridge that opens at the top of every hour during the day until 21:00. We decided for the marina even if there were empty spaces along the community dock. The people at Lefkas Marina are very friendly and helpful.