Four boats
From LifeWiki
Four boats  
View animated image  
View static image  
Pattern type  Oscillator  

Oscillator type  Babbling brook  
Billiard table  
Number of cells  16  
Bounding box  8×8  
Frequency class  33.5  
Period  2  
Mod  2  
Heat  4  
Volatility  0.20  
Strict volatility  0.20  
Rotor type  Diagonal onoff  
Discovered by  Unknown  
Year of discovery  Unknown  
 
 
 

Four boats (or hourglass^{[1]}) is a period 2 oscillator, which is composed of four boats in one of its phases. It has two diagonal onoff rotors enclosed by a common stator. While the two rotors are not connected, the stability of the stator still requires them to be in the same phase.
Image gallery
See also
References
 ↑ Mark D. Niemiec. "Life objects sorted by name". Retrieved on April 30, 2009.
External links
 4 boats at the Life Lexicon
 Four boats at Adam P. Goucher's Catagolue
 16P2.98 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Patterns with Catagolue frequency class 33.5
 Natural periodic objects
 Oscillators with 16 cells
 Patterns with 16 cells
 Patterns that can be constructed with 6 gliders
 Oscillators
 Periodic objects with minimum population 16
 Babbling brooks
 Billiard tables
 Oscillators with period 2
 Oscillators with mod 2
 Oscillators with heat 4
 Oscillators with volatility 0.20
 Oscillators with strict volatility 0.20
 Oscillators with rotor Diagonal onoff
 Patterns with rectangular diagonal symmetry