'all aboard the ice boat' - is that the idea? see below:

....oh and look at this....omg:

https://www.google.co.uk/maps/@51.5259857,-0.1067352,3a,75y,78.52h,61.25t/data=!3m8!1e1!3m6!1s-9IFqy980lOo%2FVsNKhKQ0F2I%2FAAAAAAAAAIA%2Fea1McKe4_LonuVNuPv04F25B0_F8zounQCJkC!2e4!3e11!6s%2F%2Flh4.googleusercontent.com%2F-9IFqy980lOo%2FVsNKhKQ0F2I%2FAAAAAAAAAIA%2Fea1McKe4_LonuVNuPv04F25B0_F8zounQCJkC%2Fw203-h100-k-no-pi0-ya304.88477-ro-0-fo100%2F!7i8704!8i4352

 

anyway, the marines were to pick up a signal from this building...and having scanned for more info...the ill had figured that their signal would emanate from the following 'tower'...see below: