Complex sentence: Danish customs officials suspected that the cargo might of contained weapons to arm militant Icelandic home rulers who sought independence from Denmark, however the "SS Fanny" cut loose and escaped in a gale and sailed out of Danish territorial waters.
Split into simpler sentences: Danish customs officials suspected that the cargo might have contained weapons to arm militant Icelandic home rulers who sought independence from Denmark. However the "SS Fanny" cut loose, escaped in a gale and sailed out of Danish territorial waters.