It powers a VCSEL electro-optical element (216) which energises an optical fibre (217) connected to the pressure hull penetrators (108).

The apparatus comprises a casing having a casing bore therethrough adapted to rotatably receive a support member therein.

The adults used the opportunity to clean the underwater after the long crossing.

The spark plug includes a metal shell having a through cavity, a lower insulator and a plastic upper insulator.

It powers a VCSEL electro-optical element (216) which energises an optical fibre (217) connected to the pressure hull penetrators (108).

The shell portion has a lower shell portion, a central shell portion, and a top shell portion.

The mechanism (2) has a shell (30), through which a stationary first rotational axis (D1) extends and on which a seat carrier (80) capable of being inclined is mounted.

The shell (7) includes a shell body (8) and a shell cover (10) which covers the shell body (8).

The ship's hull is fitted with a stabilizer system enabling a smooth and steady trip across the Indian Ocean.

The shell 30 presents a shell gap 38 having a shell gap width ws between a shell lower end 34 and a shell inner surface 90 or shell outer surface 92.

The casing has a casing outer surface, a casing inner surface, and a casing lateral edge formed integrally.

The shell 30 has a shell thickness ts decreasing toward the shell lower end 34 allowing the shell gap width ws to increase toward the shell lower end 34.

The plurality of feedthrough interconnects include a first feedthrough interconnect and a second feedthrough interconnect.

Additionally, both the shroud and the plate can have small angular variations with respect to the surface of the undisturbed surface through which the high-speed hull passes.

The shell seat consists of an upper shell (2) and a lower shell (3).