В чём смысл столь частых передач?
Прямо футбол какой то!
https://transphoto.org/vehicle/195500/

Затем, что трамваем Антверпена и Береговым трамваем управляет одна и та же фирма. На лето они передают часть вагонов в Береговой трамвай для обслуживания летнего "туристического" потока, а на осень-зиму возвращают в Антверпен для обычных городских перевозок. "Песочные часики" такие - летом поток больше на курортной береговой линии, осенью-зимой - в городе.

Sorry for the reply / comment in English.
The explanation above is 100 % correct: I'll just provide additional information.
These are always the same trams that were transferred from Ghent and Antwerp: these are the so-called pool trams, which have undergone some minor technical modifications in order to be able to run on the coast as well. The most important adjustment is the possibility to use removable steps: the Antwerp and Ghent trams are 10 cm narrower than those of the Coast.
In the meantime, new trams were ordered and delivered, but again, the number is sufficient for the busiest basic service (e.g. Easter holidays) but insufficient for the very busy summer service. The initial plan was to scrap all the old trams and continue the system from summer 2022 with the transfer of trams from Antwerp and Ghent. The advantage, of course, is that the maintenance centre had only one tram type to maintain.
The disadvantage is that transfers cost a lot of money and time, and because of Covid-19 in Antwerp there is a shortage of staff, so the surplus of trams is less than the other years. It was therefore decided to retain the 12 least bad BN until further notice and keep them in service, in addition to the existing 48 new trams. With these extra trams, all services on the coast can just be assured.
One low-floor tram from Antwerp remains on the coast: this serves to tow away a possibly defective CAF tram: the existing BN tram cannot do this yet, but is being converted for this purpose. Incidentally, this tram exceptionally returned to passenger service, as there was no other tram available at the time.
Finally, there should always be such a tram on the coast, to familiarise new drivers with this type of tram as well.

Thank you, Alex, your comments are always appreciated here. My knowledge on this topic is ultimately superficious, and you, being a local person, have added more interesting peculiarities.


Цитата (focus1965, 30.07.2022):
> Sorry for the reply / comment in English.

You do not have to excuse yourself, I think.