The Expert VM Marine from Pulsar features a non-axial construction, meaning that both of the optic channels are in a single body. The binoculars are also shock resistant to both vibration and shock loadings. Because the body is hermetically sealed, it's protected from water damage.
The optical system, which is purged by nitrogen, prevents the lenses from fogging as well. The binoculars are also resistant to sand and dust. The binoculars are waterproof and very brightly coloured, so they can be easily seen if dropped in water.