logbook 音标拼音: [l'ɔgb
, ʊk]
n . 航海日志,航空日志,飞机航程表
航海日志,航空日志,飞机航程表
logbook 录志卷册
logbook n 1 :
a book in which the log is written Log \
Log \,
n . [
Icel .
l [=
a ]
g a felled tree ,
log ;
akin to E .
lie .
See {
Lie }
to lie prostrate .]
1 .
A bulky piece of wood which has not been shaped by hewing or sawing .
[
1913 Webster ]
2 . [
Prob .
the same word as in sense 1 ;
cf .
LG .
log ,
lock ,
Dan .
log ,
Sw .
logg .] (
Naut .)
An apparatus for measuring the rate of a ship '
s motion through the water .
[
1913 Webster ]
Note :
The common log consists of the log -
chip ,
or logship ,
often exclusively called the log ,
and the log line ,
the former being commonly a thin wooden quadrant of five or six inches radius ,
loaded with lead on the arc to make it float with the point up .
It is attached to the log line by cords from each corner .
This line is divided into equal spaces ,
called knots ,
each bearing the same proportion to a mile that half a minute does to an hour .
The line is wound on a reel which is so held as to let it run off freely .
When the log is thrown ,
the log -
chip is kept by the water from being drawn forward ,
and the speed of the ship is shown by the number of knots run out in half a minute .
There are improved logs ,
consisting of a piece of mechanism which ,
being towed astern ,
shows the distance actually gone through by the ship ,
by means of the revolutions of a fly ,
which are registered on a dial plate .
[
1913 Webster ]
3 .
Hence :
The record of the rate of speed of a ship or airplane ,
and of the course of its progress for the duration of a voyage ;
also ,
the full nautical record of a ship '
s cruise or voyage ;
a log slate ;
a log book .
[
1913 Webster PJC ]
4 .
Hence ,
generally :
A record and tabulated statement of the person (
s )
operating ,
operations performed ,
resources consumed ,
and the work done by any machine ,
device ,
or system .
[
1913 Webster PJC ]
5 . (
Mining )
A weight or block near the free end of a hoisting rope to prevent it from being drawn through the sheave .
[
1913 Webster ]
6 . (
computers )
A record of activities performed within a program ,
or changes in a database or file on a computer ,
and typically kept as a file in the computer .
[
PJC ]
{
Log board } (
Naut .),
a board consisting of two parts shutting together like a book ,
with columns in which are entered the direction of the wind ,
course of the ship ,
etc .,
during each hour of the day and night .
These entries are transferred to the log book .
A folding slate is now used instead .
{
Log book },
or {
Logbook } (
Naut .),
(
a )
a book in which is entered the daily progress of a ship at sea ,
as indicated by the log ,
with notes on the weather and incidents of the voyage ;
the contents of the log board .
(
b )
a book in which a log [
4 ]
is recorded .
{
Log cabin }, {
Log house },
a cabin or house made of logs .
{
Log canoe },
a canoe made by shaping and hollowing out a single log ;
a dugout canoe .
{
Log glass } (
Naut .),
a small sandglass used to time the running out of the log line .
{
Log line } (
Naut .),
a line or cord about a hundred and fifty fathoms long ,
fastened to the log -
chip .
See Note under 2d {
Log },
n .,
2 .
{
Log perch } (
Zool .),
an ethiostomoid fish ,
or darter ({
Percina caprodes }); --
called also {
hogfish }
and {
rockfish }.
{
Log reel } (
Naut .),
the reel on which the log line is wound .
{
Log slate }. (
Naut .)
See {
Log board } (
above ).
{
Rough log } (
Naut .),
a first draught of a record of the cruise or voyage .
{
Smooth log } (
Naut .),
a clean copy of the rough log .
In the case of naval vessels this copy is forwarded to the proper officer of the government .
{
To heave the log } (
Naut .),
to cast the log -
chip into the water ;
also ,
the whole process of ascertaining a vessel '
s speed by the log .
[
1913 Webster ]
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