Circular 1 
ENG
通函一：夜间信号显示 – 穿过新加坡海峡分道通航制（Traffic Separation Scheme, TSS）警戒区的船舶（新加坡海事及港务管理局通函）
一项研究发现，造成新加坡海峡事故的一项重要原因是，当船舶行经新加坡海峡时难以判断进出港口的船舶是否要穿过TSS区域，这种情况在夜间尤为严重，原因跟来自陆地上的灯光有关。为了解决这个问题，建议意图穿过TSS区域的船舶悬挂夜间信号灯(全方位垂直三绿灯)来提醒航道上的船舶采取合理的避让措施以确保航行安全。该要求已在国际海事组织海事安全委员会第88次会议中通过，将于2011年7月1日0000时(UTC时间)或新加坡当地时间0800时起实施。同时附国际海事组织第SN. 1/Circ 293号通函 。具体请查看通函一。
通函二：准确申报散装货物—全球范围（From UK）
船舶稳性是船舶安全中极为重要的关注点。最早对船舶稳性的规范认可要追溯到19世纪60年代的Samuel Plimsoll。稳性规范虽已出台许久，但仍需高度关注。就在去年，有44名船员分别在三起运载矿石船舶倾覆沉没的事故中遇难。事故中船舶装载的矿石货物都被申报为”C”类。为了使各方当事人在面对如何处理、装载和装运这些货物时可以作出正确的决定，托运人必须提供准确和相关的信息。如果没有获得信息或对提供的信息有疑问，船长和/或船东应提出进一步测试的要求。具体请查看通函二。
Club Circulars 11 June 2011 – ALCO
Circular 1: Night Signals for Vessels Crossing the Traffic Separation Scheme (TSS) and Precautionary Areas in the Singapore Strait During the Hours of Darkness (from MPA Singapore )
A finding from a study found that one of the contributing factors of incidents in the Singapore Strait was that vessels transiting in the Strait are unable to distinguish whether a vessel arriving or departing from the port of Singapore would be crossing the Traffic Separation Scheme (TSS). This is due to the difficulties in visually identifying the vessel especially at night when there are background lights from landwards. To address the issue of identifying crossing vessels during hours of darkness, a night signal was proposed consisting of “three all-round green lights in a vertical line” which will be displayed by vessels to indicate its intention to cross the TSS. That will allow other vessels in the appropriate lanes to take actions if required and hence enhance navigational safety. With effect from 1st July 2011 at 0000hrs UTC (0800hrs Singapore LT), vessels crossing the Traffic Separation Scheme (TSS) and precautionary areas in the Singapore Strait are recommended to display the night signals consisting of 3 all-round green lights in a vertical line. This measure was adopted by the IMO’s Maritime Safety Committee, at its eighty-eighth session (24 November to 03 December 2010) in accordance with the provisions of resolution A.858(20). Details please refer to attached circular 1.
Circular 2: Accurate Bulk Cargo Declarations – Worldwide (from UK )
The stability of a vessel is of paramount concern in regard to the safety of the vessel. The earliest regulatory recognition of this can be traced to before Samuel Plimsoll in the 1860’s. Times have moved on and stability regulations have come on a long way but the concern remains high. Only as recent as last year 44 seafarers lost their lives in three separate incidents where vessels carrying ore cargoes capsized and sank. In each case the vessels had loaded ore cargoes which were declared as Group “C”. In order that ALL parties can make the correct decisions in regard to how best to handle, load and ship these cargoes it is imperative that correct, accurate and relevant information is supplied by the shipper. If information is not forthcoming or there is doubt as to the validity of the information supplied the Master and/or vessel owner should voice concerns and request further testing. Details please refer to circular 2.
