\begin{tikzpicture}           
% Grid
\draw [rounded corners,menublue,fill=gray99, ultra thin]
(0,2.75) -- (0,0) -- (7,0) -- (7,5.5) -- (0,5.5) -- (0,2.75);
\draw [color=gray95, thin] (3.5,0) -- (3.5,5.5);
\draw [color=gray95, thin] (3.93371,0) -- (3.93371,5.5);
\draw [color=gray95, thin] (4.36741,0) -- (4.36741,5.5);
\draw [color=gray95, thin] (4.80112,0) -- (4.80112,5.5);
\draw [color=gray95, thin] (5.23482,0) -- (5.23482,5.5);
\draw [color=gray95, thin] (5.66853,0) -- (5.66853,5.5);
\draw [color=gray95, thin] (6.10223,0) -- (6.10223,5.5);
\draw [color=gray95, thin] (6.53594,0) -- (6.53594,5.5);
\draw [color=gray95, thin] (6.96964,0) -- (6.96964,5.5);
\draw [color=gray95, thin] (3.06629,0) -- (3.06629,5.5);
\draw [color=gray95, thin] (2.63259,0) -- (2.63259,5.5);
\draw [color=gray95, thin] (2.19888,0) -- (2.19888,5.5);
\draw [color=gray95, thin] (1.76518,0) -- (1.76518,5.5);
\draw [color=gray95, thin] (1.33147,0) -- (1.33147,5.5);
\draw [color=gray95, thin] (0.89777,0) -- (0.89777,5.5);
\draw [color=gray95, thin] (0.464064,0) -- (0.464064,5.5);
\draw [color=gray95, thin] (0.0303594,0) -- (0.0303594,5.5);
\draw [color=gray95, thin] (0,2.75) -- (7,2.75);
\draw [color=gray95, thin] (0,3.18371) -- (7,3.18371);
\draw [color=gray95, thin] (0,3.61741) -- (7,3.61741);
\draw [color=gray95, thin] (0,4.05112) -- (7,4.05112);
\draw [color=gray95, thin] (0,4.48482) -- (7,4.48482);
\draw [color=gray95, thin] (0,4.91853) -- (7,4.91853);
\draw [color=gray95, thin] (0,5.35223) -- (7,5.35223);
\draw [color=gray95, thin] (0,2.31629) -- (7,2.31629);
\draw [color=gray95, thin] (0,1.88259) -- (7,1.88259);
\draw [color=gray95, thin] (0,1.44888) -- (7,1.44888);
\draw [color=gray95, thin] (0,1.01518) -- (7,1.01518);
\draw [color=gray95, thin] (0,0.581475) -- (7,0.581475);
\draw [color=gray95, thin] (0,0.14777) -- (7,0.14777);
% Grid
\draw [rounded corners,menublue, ultra thin]
(0,2.75) -- (0,0) -- (7,0) -- (7,5.5) -- (0,5.5) -- (0,2.75);


% Draw Wedge: contact:twedge
\draw [color=black,fill=gray95, very thin] 
(3.6171,2.75) -- (3.6171,4.91853) arc (90:202.5:2.16853) -- (3.6171,2.75) arc (202.5:90:0) -- cycle;
% Draw Wedge: contact:plus_67
\draw [color=gray60, very thin] 
(3.6171,4.48482) -- (3.6171,4.48482) arc (90:202.5:1.73482) -- (2.01434,2.08611) arc (202.5:90:1.73482) -- cycle;
% Text Label
\draw [color=black] (0.86741,3.87763) node {\scriptsize
ownship
};

% Text Label
\draw [color=black] (4.39777,2.92348) node {\scriptsize
contact
};

% Text Label
\draw [color=black] (2.40273,1.96933) node {\tiny
$247.5^{\circ}$
};

% Text Label
\draw [color=black] (2.53284,3.49597) node {\tiny
$112.5^{\circ}$
};

% Text Label
\draw [color=black] (3.87732,4.31134) node {\tiny
$0^{\circ}$
};

% Ship drawing: inside triangle
\draw [color=gray90, fill=gray90, ultra thin] 
(3.55825,2.53315) -- (3.6171,2.96685) -- (3.67595,2.53315);
% Ship drawing: left side of bow 
\draw [color=black,fill=gray90, ultra thin] 
(3.55825,2.53315) .. controls (3.50867,2.80421) .. (3.6171,2.96685);
% Ship drawing: right side of bow 
\draw [color=black,fill=gray90, ultra thin] 
(3.67595,2.53315) .. controls (3.72553,2.80421) .. (3.6171,2.96685);
% Ship drawing: stern line 
\draw [color=black, ultra thin] 
(3.55825,2.53315) -- (3.67595,2.53315);
% Text Label
\draw [color=black] (5.78563,0.754957) node {\scriptsize
$\alpha>247.5$
};

% Ship drawing: inside triangle
\draw [color=white, fill=white, ultra thin] 
(1.4236,3.95451) -- (1.85467,4.0303) -- (1.45939,3.84238);
% Ship drawing: left side of bow 
\draw [color=black,fill=white, ultra thin] 
(1.4236,3.95451) .. controls (1.66526,4.08886) .. (1.85467,4.0303);
% Ship drawing: right side of bow 
\draw [color=black,fill=white, ultra thin] 
(1.45939,3.84238) .. controls (1.73419,3.87285) .. (1.85467,4.0303);
% Ship drawing: stern line 
\draw [color=black, ultra thin] 
(1.4236,3.95451) -- (1.45939,3.84238);
% Draw Point: ownship:ship_ctr
\draw [color=black,fill=black, thin] 
(1.64808,3.96437) circle (0.02cm);
% Draw Point: contact:ship_ctr
\draw [color=black,fill=black, thin] 
(3.6171,2.75) circle (0.02cm);
% Draw Line: contact:cn_north
\draw [color=gray25, ->, thin] 
(3.6171,2.75) -- (3.6171,4.05112);
% Draw Line: contact:cn_south
\draw [color=gray25, dotted, thin] 
(3.6171,2.75) -- (3.6171,0.581475);
% Draw Circle: contact:range
\draw [color=darkblue, very thin] 
(3.6171,2.75) circle (2.16853cm);
\end{tikzpicture}  
