In materials, BS 1088 is the British Standard specification for marine plywood that applies to plywood produced with untreated tropical hardwood veneers that have a set level of resistance to fungal attack.
The plies are bonded with Weather Boil Proof (WBP) glue.
WBP Glue Line -- BS 1088 plywood must use an adhesive, which has been proven to be highly resistant to weather, micro-organisms, cold and boiling water, steam and dry heat.
Face Veneers -- These must present a solid surface that is free from open defects.
Occasional gaps may be repaired using veneer inserts bonded with the proper adhesive.