" SUBMARINE "

 smaller than military submarines. Tourist subm
 mainly in tropical resort areas or other areas
water and good visibility. By 1996 there we
private submarines operating around the
, serving approximately two million
ngers a year. Most of them carrie
d between twenty-five and fi
fty passengers at a time
and sometimes mad
e ten or more di
ves per day
. In desi
gn, th
ese
 subm
arines bo
rrow mainly
 from research s
ubs, having large por
tholes for passengers' view
ing and often placing significant
 mechanical systems outside the hul
l to conserve interior space. Nonetheless,
even aboard touristage, "submarine" means a sh
ip that operates above and below the surface, untet
hered. Underwater vessels with limited mobility, inten
ded to remain in one place during most of their use, such
 as those used for rescue, research or salvage purposes are us
ually called "submersibles". Submersibles are typically transport
ed to their area of operation by surface ships or large submarines and
have a very short range. Many submersibles operate on a "tethmall, unmanned
submersibles called "marine remotely operated vehicles" (MROVs) are widely used tod
ay to work in water too deep or too dangerous for divers. For example, remotely operated veh
icles (ROVs) repair offshore petroleum platforms and attach cables to sunken ships to hoist them. A
 

Comments

[P.CHARPENTIER]

Et pourquoi ne pas nager ou voler plutôt?

[Anouchka]

J'adore ton sous-marin. On plonge ensemble ? ;-)