directly航海英语部分词汇解释

Angle of loll

负稳性初倾角，负稳性横倾角，失稳横倾角

A ship having a very small negative initial metacentric height GM need

not necessarily capsize. This situation produces an angle of loll.

初稳性

高度为一个非常小的负 值的船舶不一定倾覆。

这种情况产生负稳性横

倾角。

As the angle of heel increases, the centre of buoyancy will move out still

further to the low side. If the centre of buoyancy moves out to a position

vertically

under

G

,

the

capsizing

moment

will

have

disappeared.

The

angle

of

heel

at

which

this

occurs

is

called

the

angle

of

loll.

It

will

be

noticed that at the angle of loll, the GZ is zero.

随着横倾角增大，

浮心将

缓慢向外移，

进一步移到较低的一舷。

如果浮心向外移至船舶重心的

正下方某一位置，

倾覆力矩将会已经消失。

这时的横倾角称为负稳性

横倾角。将 会注意到在负稳性横倾角处静稳性力臂为

0

。

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【美国原题】

1. An upright vessel has negative GM. GM becomes positive at the angle

of loll because the ______.

A. free surface effects are reduced due to pocketing

B. KG is reduced as the vessel seeks the angle of loll

C. effective beam is increased causing BM to increase

有效船宽增大

导致

BM

增大

[GM=KB+BM- KG

，如果

(KB-KG)

不变而

BM

增大，

从而导致

GM

增大并转为正值

]

。

D. underwater volume of the hull is increased

2. The angle of loll is a stability term which applies to a floating MODU

with ______. MODU: mobile offshore drilling

unit

移动式近海钻井平

台

A. off-center loading

B. stiff characteristics

C. excessive pitch or roll

D.

negative initial stability

3.

A MODU

is inclined at an

angle of

loll.

In the absence of external

forces, the righting arm (GZ) is ______. righting arm (GZ)

复原力臂，也

称为静稳性力臂

A. positive

B. negative

C. zero

D. vertical

4. A floating MODU with an initial negative metacentric height ______.

A. will capsize

B. will incline further

C. may lie at an angle of loll

D. may be initially level

5.

When a floating

MODU

inclines to an angle slightly greater than the

angle of loll, she will ______.

A. capsize

B. incline further

C. flop to the other side

D. return to the angle of loll

6. When a floating MODU inclines to an angle slightly less than the angle

of loll, she will ______.

A. capsize

B. incline less

C. flop to the other side

D. return to the angle of loll

7. At an angle of loll, the capsizing moment is ______. capsizing moment

倾覆力矩

A. maximum

B. negative

C. positive

D. zero

8. At an angle of loll, the righting arm (GZ) is ______.

A. maximum

B. negative

C. positive, but reflexive

D. zero

Liftboat

多功能工程船

A liftboat is a self-propelled, self- elevating vessel with a relatively large

open

deck

capable

of

carrying

equipment

and

supplies

in

support

of

various

offshore

mineral

exploration

and

production

or

offshore

construction activities. A liftboat also has the capability of rapidly raising

its

hull

clear

of

the

water

on

its

own

legs

so

as

to

provide

a

stable

platform

from

which

maintenance

and

construction

work

may

be

conducted.

【美国原题】

1.

Y

ou

are

operating

a

liftboat.

Before

starting

jacking

operations

you

should ______.

A. put the crane in a vertical position

B. close the wheelhouse doors

C. have all personnel don life jackets

叫所有人员穿救生衣

D. put a watch in the engineroom

2. A flooded leg on a liftboat would adversely affect the vessel's stability

underway by ______.

A. increasing the righting moment

B. decreasing the vessel's displacement

C. increasing the reserve buoyancy

D. shifting the CG (center of gravity) off center

3. Y

ou are operating a liftboat. When beginning to jack down you should

______.

A. jack down one leg at a time

B. jack up first, then down

先顶起再往下压

C. undog doors to the engine room

D. assemble all personnel on the main deck

4. After jacking down your liftboat you have an unexpected list. Y

ou find

that the only cause of this list must be a flooded leg. Y

our next course of

action should be to ______.

A. jack the vessel back up to a safe height

将船舶顶回到一个安全的