Well this map is originally from css zombie mod but i played it on a ttt server once and it was awesome , it features a boat which circles the map and the glass on it is breakable , it kind of similar to ttt_vessel , it also has an underground floor and a captains room :)
Anyway here are some screenies :- Album link :- http://img13.imageshack.us/slideshow/webplayer.php?id=2011052500021.jpg (http://img13.imageshack.us/slideshow/webplayer.php?id=2011052500021.jpg)
(http://img13.imageshack.us/img13/8697/2011052500021.jpg)
(http://img593.imageshack.us/img593/3237/2011052500013.jpg)
(http://img705.imageshack.us/img705/2967/2011052500014.jpg)
(http://img163.imageshack.us/img163/9746/2011052500015.jpg)
(http://img828.imageshack.us/img828/9763/2011052500016.jpg)
(http://img4.imageshack.us/img4/6593/2011052500017.jpg)
(http://img845.imageshack.us/img845/8277/2011052500018.jpg)
(http://img818.imageshack.us/img818/1149/2011052500019.jpg)
(http://img840.imageshack.us/img840/9324/2011052500020.jpg)
anyway if you want to try it here i have uploaded it :-
http://www.mediafire.com/?68tnrkme58h0641 (http://www.mediafire.com/?68tnrkme58h0641)
Virus scan done via virus total:-
http://www.virustotal.com/file-scan/report.html?id=93e1262a8c48e725e636770a18fbf50c77bd7d687bbef0cacf3a3fafae8c0824-1306393474# (http://www.virustotal.com/file-scan/report.html?id=93e1262a8c48e725e636770a18fbf50c77bd7d687bbef0cacf3a3fafae8c0824-1306393474#)
(copy it to D:\Steam\steamapps\[username]\garrysmod\garrysmod\maps\)