War risk zone                                     
Area where special premium assurance is applied

Typical quote for a 8 days service / 4 armed guards would be between 10 to 20kUSD

French flag vessel
Only French naval forces allowed on a french flag vessel 
No PSD ( private security detachments ).

Hardening Vessels

Before seismic surveys in sensitive areas happen , vessels have to be hardened, Barbed wire installation but also securing the vessel entries is at stake. Part of it can be done offshore for seismic vessels or support vessels but 2 days onshore is sometimes a minimum to be considered.