This is the model for what was supposed to be an information site sort of like a wiki but in which the information is updated every couple years at most.  The project is currently on hold and hopefully will not include such a silly navigation system.  Nonetheless I wanted to share the model and how I implemented it here because of the unusual nature.

Naturally I could have made it an image map or use flash (gross to both) but I wanted to keep it simple and accessible, so I used javascript and math.

jQuery(document).ready(function(){
	$("#circle").mousemove(function(e){
		var center = $(this).offset();
		center.left += 242;
		center.top += 242;
		var mouse = {'left': e.pageX, 'top': e.pageY};
		var distance = Math.sqrt(Math.pow(mouse.left - center.left, 2) + Math.pow(mouse.top - center.top, 2));
		var angle = Math.atan2( mouse.left - center.left, mouse.top - center.top ) *(180/Math.PI) + 180;
		var debug;
		if(distance < 60){
			debug = "self management";
		} else if(distance < 90){
			debug = "nps universal";
		} else if(distance < 197){
			if(angle > 325 || angle < 35){
				debug = "i";
			} else if(angle < 325 & angle > 252){
				debug = "ii";
			} else if(angle < 252 & angle > 180){
				debug = "iii";
			} else if(angle < 180 & angle > 107){
				debug = "iv";
			} else if(angle > 35 & angle < 107){
				debug = "v";
			}
		} else if(distance < 228){
			debug = "supervision etc";
		}
		console.log(debug);
	});
})

It's more of a proof of concept because the project is on hold, but I found the solution fairly elegant.