The best thing to do if you're wondering when the coast guard exam results are set to be released is to contact your individual assessor.
Often times, the exam results come out during the spring time, around early March.
This gives junior coast guards the opportunity to train and gain some valuable experience before hitting the busiest time of the year.
Some groups have also formed on social media to keep prospective coast guards informed about developments regarding their exam results.
For example, this facebook page was set up by the Philippine Coast Guard: https://www.facebook.com/pages/PHILIPPINE-COAST-GUARD/125674810786701
It doesn't look they have been very active on the page, but they did include a link to their website encouraging people to ask questions, so maybe this is your best bet if you're too shy to ask your application leader.