1. A method for controlling the speed of a watercraft that allows for engaging the speed control system without limitation to current engine or vessel speed.
2. The method as set forth in claim 1 additionally comprising the use of the position of the operator controlled throttle lever to limit the authority of the watercraft speed control system by limiting the maximum allowable torque output of the prime mover.
3. The method as described herein.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A separator comprising:
a base material layer made of a microporous membrane of a polyolefin resin; and
a functional resin layer which is made of a resin different from said polyolefin resin and has a porous interconnected structure in which many holes are mutually interconnected,
wherein a diameter of a narrowest portion of through-holes of said functional resin layer is larger than a diameter of a narrowest portion of through-holes of said base material layer.
2. The separator according to claim 1, wherein
all of the diameters of the through-holes of said functional resin layer range from 0.015 \u03bcm or more to 20 \u03bcm or less and
the number of said through-holes whose diameters range from 0.02 \u03bcm or more to 10 \u03bcm or less is equal to 50% or more in the whole number of through-holes.
3. The separator according to claim 1, wherein said functional resin layer contains at least a heat resistant resin.
4. The separator according to claim 1, wherein said functional resin layer contains at least a fluororesin.
5. The separator according to claim 1, wherein air permeability of said separator ranges from 30 sec100 cc or more to 1000 sec100 cc or less.
6. The separator according to claim 1, wherein a piercing strength of said separator range from 100 gf or more to 1000 gf or less.
7. A battery comprising a cathode, an anode, an electrolyte, and a separator,
wherein said separator has at least
a base material layer made of a microporous membrane of a polyolefin resin and
a functional resin layer which is made of a resin different from said polyolefin resin and has a porous interconnected structure in which many holes are mutually interconnected, and
a diameter of a narrowest portion of through-holes of said functional resin layer is larger than a diameter of a narrowest portion of through-holes of said base material layer.
8. The battery according to claim 7, wherein an open circuit voltage in a full charging state lies within a range from 4.2V or more to 4.6V or less.