As someone that undertakes as many suitable courses as I can, time permitted, with a wide variety of training providers. I personally have always found ARG and the instructors to be very knowledgable, professional and of a very high standard.
They continue to have integrity in their teaching and put the students needs first, rather than just the bottom line of making money.
I can highly recommend the maritime fresher course. This course is not just suitable to the maritime sector but to the use of firearms in general, either on land or at sea.
They have ever improving facilities and good quality training equipment carefully chosen to suit the students and course requirements.
As a refresher course it covers all the foundation skills and more.